Watch & Solve! ☝️☝️☝️
This video takes you on a mystery adventure to find the secret six-digit number.
Pause, think, and solve each clue as it appears.
 Keep your notebook ready and become the Codebreaker Detective!

🧩Before watching the video refer to the Guide given below to revise all the topics 

🧩Before the Video: Read to prepare for the treasure hunt and understand number skills, including comma placement.

🧩During the Video: Refer to the charts or comma rules to solve the 3 puzzles in the “Treasure Hunt and the Number Nabber” video.

🧩After the Video: Review to prepare for assignments or quizzes. Complete the Assignment and the quiz and submit it to earn your badge.

📚Submission: If assigned, upload your answers of the video ""Maths Mystery Mission 1: The Case of the Six-Digit Secret" via the platform’s assignment tool (photo/PDF or form).

Number Nabber’s Challenge: Outsmart the Nabber by mastering numbers and commas! Share one thing you learned (e.g., how to place commas) on the platform’s discussion board for bonus Treasure Hunter points!

✨ About the Story Video: "The Lost Treasure-Maths Mystery Mission 1: The Case of the Six-Digit Secret"
Join two young explorers on an exciting treasure hunt filled with hidden clues, ancient number scrolls, and secret codes! As they race through mysterious caves and decode magical maps, kids will learn how to read and write large numbers, compare them, and understand place value in both Indian and International systems.

This story adventure makes learning fun and meaningful by turning tricky number topics into a thrilling mission. Perfect for Grade 4 learners, it builds strong number sense and problem-solving skills — all while keeping them hooked to the mystery!

• Understanding 4-digit, 5-digit, and 6-digit numbers
• Indian and International place value systems
• Comparison of numbers, ascending/descending order

"The Lost Treasure-Maths Mystery Mission 1: The Case of the Six-Digit Secret"

Welcome, Treasure Hunters! In Unit 1, join the adventure in the “Treasure Hunt and the Number Nabber” video to outsmart the Number Nabber and unlock hidden treasures using numbers. This guide explains what you’ll master, including how to place commas in Indian and International systems to read numbers correctly. Use it before watching the video to prepare, during the video to solve puzzles, or after to review. Download this guide or view it on the platform.

🗝️Key Concepts:

🌟Place Value:Each digit’s value depends on its position (e.g., in 6,789, the digit 6 is in the thousands place, so its value is 6,000).

🌟Expanded Form:Breaks a number into its place values (e.g., 6,789 = 6,000 + 700 + 80 + 9).

🌟Word Form:Writes the number in words (e.g., 6,789 = six thousand seven hundred eighty-nine).

🌟Example:

The Number Nabber hides a 6-digit treasure code: 345,678.

🌟Standard form: 345,678

🌟Expanded form: 300,000 + 40,000 + 5,000 + 600 + 70 + 8

🌟Word form: Three hundred forty-five thousand six hundred seventy-eight

Try It: What is the place value of 4 in 54,321? (Answer: 4,000)

🗝️Key Concepts:

🧩Indian System:

🔍Place values: Ones, Tens, Hundreds, Thousands, Ten Thousands, Lakhs.

🔍Comma Placement: Start from the right; place the first comma after 3 digits (hundreds), then every 2 digits (e.g., 123456 → 1,23,456).

Example: 234567 → 2,34,567 (2 lakhs, 34 thousand, 567).

🧩International System:

🔍Place values: Ones, Tens, Hundreds, Thousands, Ten Thousands, Hundred Thousands, Millions.

🔍Comma Placement: Start from the right; place commas every 3 digits (e.g., 123456 → 123,456).

🔍Example: 234567 → 234,567 (234 thousand, 567).

🧩Word Form Difference:

🔍Indian: 2,34,567 = Two lakh thirty-four thousand five hundred sixty-seven.

🔍International: 234,567 = Two hundred thirty-four thousand five hundred sixty-seven.

🔍Example:

🪄Treasure code: 567890

In Indian System:

🌟Commas: 5,67,890 (place comma after 890, then after 67).

🌟Place value chart:

🌟Word form: Five lakh sixty-seven thousand eight hundred ninety

🧩In International System:

🌟Commas: 567,890 (place commas after 890 and 567).

🌟Place value chart:

Word form: Five hundred sixty-seven thousand eight hundred ninety.

Try It: Write 789123 with commas in the Indian system and in words. (Answer: 7,89,123; Seven lakh eighty-nine thousand one hundred twenty-three)

3. Comparison of Numbers, Ascending/Descending Order

🗝️Key Concepts:

🔍Comparison: Check digits from the highest place value to the lowest (e.g., compare 56,789 and 56,987 by checking digits step-by-step).

🔍Ascending Order: List numbers from smallest to largest (e.g., 23,456; 34,567; 45,678).

🔍Descending Order: List numbers from largest to smallest (e.g., 45,678; 34,567; 23,456).

🔍Example:

🧠Compare 234,567 and 234,678:

🧩Commas: 2,34,567 (Indian) or 234,567 (International) 

🧩The digits are same in hundred thousands/lakhs, ten thousands, thousands->(2, 3, 4).The hundreds place is different, so we compare them

🧩Hundreds place: 5 vs 6 -> (5 < 6), so 234,567 < 234,678.

🧠Arrange in ascending order: 5,67,890; 5,67,908; 5,76,890 (Indian system).

🧩Compare digits: 5,67,890 < 5,67,908 < 5,76,890 (check thousands and hundreds).

🧠Try It:Arrange 89,123; 88,912; 89,213 (use commas: 89,123; 88,912; 89,213) in descending order. (Answer: 89,213; 89,123; 88,912)

🧠How to Use This Guide

🧩Before the Video: Read to prepare for the treasure hunt and understand number skills, including comma placement.

🧩During the Video: Refer to the charts or comma rules to solve the 3 puzzles in the “Treasure Hunt and the Number Nabber” video.

🧩After the Video: Review to prepare for assignments or quizzes. Practice the “Try It” questions in your notebook.

🧩Submission: If assigned, upload your “Try It” answers via the platform’s assignment tool (photo/PDF or form).

🧠Number Nabber’s Challenge: Outsmart the Nabber by mastering numbers and commas! Share one thing you learned (e.g., how to place commas) on the platform’s discussion board for bonus Treasure Hunter points!

📚Quick Summary

🚀Understanding 4, 5, and 6 Digit Numbers

4-digit numbers: 1,000 to 9,999
✅ Example: 4,562 → Four thousand five hundred sixty-two

5-digit numbers: 10,000 to 99,999
✅ Example: 48,752

6-digit numbers: 1,00,000 to 9,99,999
✅ Example: 3,09,215

🚀Place Value System

🚀Indian Place Value System:

🧩Ones, Tens, Hundreds, Thousands, Ten Thousands, Lakhs
✅ Example: 4,57,812 =

4 lakhs + 57 thousand + 812

In words: Four lakh fifty-seven thousand eight hundred twelve

 🚀International Place Value System:

🧩Ones, Tens, Hundreds, Thousands, Ten Thousands, Hundred Thousands

✅ Example: 457,812 =

In words: Four hundred fifty-seven thousand eight hundred twelve

🚀Place Value & Face Value

✅ Place Value

Place value means the value of a digit depending on its position.

Example: In 48,752,

The place value of 8 is 8,000 (in the thousands place)

✅ Face Value

Face value means the digit itself, no matter where it appears.

Example: In 48,752,

The face value of 8 is simply 8

✅ Example Table:

🚀Comparison of Numbers

🪄Compare number of digits first

🪄If digits are same, compare from left to right

✅ Example
Compare 78,901 and 78,099-start the comparison from the left most digit

78,901 > 78,099

🚀Ordering Numbers

Ascending Order = Smallest → Largest

Descending Order = Largest → Smallest

✅ Example
Arrange 456789, 456987, 465789 in ascending order:
🧩456789 < 456987 < 465789

✍️ Writing Numbers in Words

✅ Example : 78,901

🧩Indian: Seventy-eight thousand nine hundred one

🧩International: Same as above

✅ Example : 3,09,215

🧩Indian: Three lakh nine thousand two hundred fifteen

🧩International: Three hundred nine thousand two hundred fifteen

📘Solve the Worksheet: Number Ninjas Challenge

🧩Theme: 🥋 Become a Number Ninja by mastering big numbers and their secrets!

📚Section A: Place Value Power! 🧮

Instructions: Answer each question carefully. Show working where needed.

1. Fill in the blanks:

a) In the number 5,29,781, the digit 9 is in the __________ place (Indian System).
b) In the number 264,305, the digit 2 is in the __________ place (International System).
c) The place value of 7 in 7,02,314 is __________.
d) In 856,302, the digit at the ten-thousands place is __________.

2. Write the following in words:

a) 4,05,729 (Indian System)
b) 402,781 (International System)

3. Write the numeral for:

a) Four lakh thirty thousand twenty
b) Six hundred twenty-four thousand one hundred two

📚Section B: Place Value Detective – Find the Error! 🔍

🧩Instructions: Each question below has a mistake. Spot and correct it.

1. Given: 76,501 = Seventy-six lakh five hundred one.
   ✅ Correct version: ___________________________________________

2. Given: In the number 5,48,203, the digit 8 is in the thousand's place (Indian).
   ✅ Correct version: ___________________________________________

📚Section C: Compare the Giants 🦖

Instructions: Use >, <, or = to compare.

1. 5,34,281 ___ 534,281

2. 4,10,200 ___ 410,201

3. 305,412 ___ 3,05,412

4. 9,05,100 ___ 905,000

📚Section D: Order the Numbers Like a Pro! 📊

Instructions: Arrange in ascending order:

1. 6,24,831  5,89,123  6,10,789  5,99,999

Now arrange the same numbers in descending order.

📚Section E: Challenge Zone – Olympiad Style 🏆

1. The difference between the greatest and the smallest 6-digit number using digits 3, 7, 1, 0, 6, 4 without repetition is:

2. Write a 5-digit number where:

✅Digit in ten thousands place is 4

✅Digit in hundreds place is 3

✅Digit in ones place is twice the digit in the tens place

✅Digit in the thousands place is 1 more than the digit in the hundreds place

✅ Number formed: _____________________

📚 Bonus Round: Decode the Number Code

✅"I am a 6-digit number.

✅My hundred thousands digit is twice my thousands digit.

✅My ten thousands digit is 1 more than my units digit.

✅My hundreds digit is 0.

✅My number is between 400,000 and 500,000."

🤔 What number am I? ____________________

✅ Answer Key

Section A: Place Value Power! 🧮

1. Fill in the blanks:
a) Thousands
b) Hundred thousands
c) 7,00,000
d) 5

2. Write in words:
a) Four lakh five thousand seven hundred twenty-nine
b) Four hundred two thousand seven hundred eighty-one

3. Write the numeral:
a) 4,30,020
b) 624,102

Section B: Place Value Detective – Find the Error! 🔍

1. ❌ 76,501 = Seventy-six lakh five hundred one
   ✅ 76,501 = Seventy-six thousand five hundred one

2. ❌ In 5,48,203, digit 8 is in the thousand's place (Indian)
   ✅ In 5,48,203, digit 8 is in the ten-thousands place (Indian)

Section C: Compare the Giants 🦖

(Use >, <, or =)

1. 5,34,281 > 534,281 (Indian number is larger)

2. 4,10,200 < 410,201 (International number is larger)

3. 305,412 = 3,05,412 (Same number, different system)

4. 9,05,100 > 905,000 (Indian number is larger)

Section D: Order the Numbers 📊

Ascending Order:
5,89,123 < 5,99,999 < 6,10,789 < 6,24,831

Descending Order:
6,24,831 > 6,10,789 > 5,99,999 > 5,89,123

Section E: Challenge Zone 🏆

1. Greatest number using 3,7,1,0,6,4: 764310
Smallest number (1st digit ≠ 0): 103467
Difference = 764310 - 103467 = 660843

Conditions:

Ten-thousands = 4

Thousands = 4 (because hundreds is 3 → thousands is 3+1 = 4)

Hundreds = 3

Ones is twice the tens → try tens = 2 → ones = 4

✅ Number: 44,324

Bonus Round: Decode the Number Code

Clues:

✅6-digit number between 400,000 and 500,000 → starts with 4

✅Hundred thousands = 4

✅Let’s use thousands = 2 → so hundred thousands = 4 = 2×2 ✅

✅Ten thousands = 1 more than ones → try ones = 3 → ten thousands = 4

✅Hundreds = 0

Now arrange:
Hundred thousands: 4
Ten thousands: 4
Thousands: 2
Hundreds: 0
Tens: any
Ones: 3

Try tens = 5 (arbitrary acceptable digit)

✅ Number: 442053

Picture Based Solved Puzzles (Answers after the exercise)

Question 1: The Number Nabber clues

Question: The Number Nabber says, “Follow my clues to the treasure! Arrange the numbers 12,890, 67,543, and 98,765 in ascending order (smallest to largest) to find the right path. Then, arrange them in descending order (largest to smallest) to avoid the jellybean trap! But wait—Clumsy Carl spilled 5,000 extra gold coins, and you must add that to the smallest number in the ascending order to unlock the final clue. What order should you follow for each path, and what’s the new total for the final clue?”

Hint: Start with the smallest number for ascending order and the biggest for descending order. Add 5,000 to the smallest number after arranging—watch Carl’s mess!

Question 2:Clumsy Carl’s Number Pile

Question: Oh no! Clumsy Carl dropped his coins! Arrange the numbers 23,456, 67,890, 12,345, and 89,123 in ascending order. Then, for the number 50,000 (which he lost), find its predecessor and successor to help him find it. What are they?

Hint: Sort from smallest to largest first. The predecessor is one less, and the successor is one more than 50,000.

Question 3: Pickle-Pants’ Number Parrot Perch

Question: Pickle-Pants squawks, “Arrange my numbers 34,567, 12,890, 78,901, and 45,123 in ascending order to climb up my ladder! Then arrange them in descending order to avoid the jellybean rain! What’s the right order for each?”

Hint: Climb up by starting small, and slide down by starting big. Watch those digits closely!

Question 4. Captain Giggles’ Number Cannon

Question: Captain Giggles is firing numbers! Arrange the cannonballs with 123,456, 89,123, 56,789, and 234,567 in descending order to hit the target. Then, pick the number 100,000 (a missing cannonball) and find its predecessor and successor. What are they?

Hint: Start with the biggest number for descending order. For 100,000, go one back and one forward!

Question 5. The Number Nabber’s Clue Bottle

Question: Bouncy Bella found the Number Nabber’s bottle! Arrange the numbers 56,789, 12,345, 89,123, and 34,567 in ascending order. Then, for the number 75,000 (a secret clue), find its predecessor and successor. What are they?

Hint: Line up the numbers from smallest to biggest. For 75,000, think one less and one more!

Answer Key 

1. The Number Nabber’s Clue
   • Ascending Order: 12,890, 67,543, 98,765
   • Descending Order: 98,765, 67,543, 12,890
   • Final Clue Total: Smallest number in ascending order is 12,890; 12,890 + 5,000 = 17,890
2. Clumsy Carl’s Number Pile
   • Ascending: 12,345, 23,456, 67,890, 89,123
   • Predecessor of 50,000: 49,999
   • Successor of 50,000: 50,001
3. Pickle-Pants’ Number Parrot Perch
   • Ascending: 12,890, 34,567, 45,123, 78,901
   • Descending: 78,901, 45,123, 34,567, 12,890
4. Captain Giggles’ Number Cannon
   • Descending: 234,567, 123,456, 89,123, 56,789
   • Predecessor of 100,000: 99,999
   • Successor of 100,000: 100,001
5. The Number Nabber’s Clue Bottle
   • Ascending: 12,345, 34,567, 56,789, 89,123
   • Predecessor of 75,000: 74,999
   • Successor of 75,000: 75,001