In Class 6 Maths, Chapter 3: Number Play, you will revise how numbers can form patterns, puzzles, and interesting tricks. You’ll solve multiple-choice questions with four options and answers to check your understanding of the chapter’s key facts and examples. You’ll also practice fill-in-the-blank questions that test your memory of definitions and important details, with answers provided. It’s a quick and fun way to revise the whole chapter and test yourself effectively!
Class 6 Maths Chapter 3 MCQ Number Play
Question 1: Which of these is an example of estimation?
a) Counting each grain of rice in a bag
b) Saying the bag has about 5000 grains
c) Measuring exact distance with a scale
d) Writing the exact number of students
Answer:
b) Saying the bag has about 5000 grains
Question 2: In the park activity, a child says “2” if ___.
a) Both neighbours are taller
b) One neighbour is taller
c) None of the neighbours are taller
d) They are the tallest
Answer:
a) Both neighbours are taller
Question 3: In the park activity, can two children standing next to each other say the same number?
a) Yes
b) No
c) Only at the ends
d) Never
Answer:
a) Yes
Question 4: In a supercell table, a cell is called a supercell if ___.
a) It is even
b) It is prime
c) It is greater than its neighbours
d) It is smaller than its neighbours
Answer:
c) It is greater than its neighbours
Question 5: Which of the following can be a supercell?
a) A number smaller than all its neighbours
b) The largest number among its neighbours
c) A number equal to its neighbours
d) A number with only odd digits
Answer:
b) The largest number among its neighbours
Question 6: Can the smallest number in a table be a supercell?
a) Yes, always
b) Yes, if all its neighbours are larger
c) Yes, if it is greater than its neighbours
d) No, never
Answer:
c) Yes, if it is greater than its neighbours
Question 7: On a number line, the number that comes between 2754 and 3050 is closer to ___.
a) 2754
b) 3050
c) 9990
d) 1500
Answer:
b) 3050
Question 8: How many 1-digit numbers are there?
a) 8
b) 9
c) 10
d) 11
Answer:
b) 9
Question 9: The digit sum of 68 is equal to the digit sum of ___.
a) 176
b) 545
c) Both 176 and 545
d) Neither
Answer:
c) Both 176 and 545
Question 10: Among the numbers 1–100, the digit “7” occurs ___ times.
a) 10
b) 15
c) 20
d) 21
Answer:
d) 21
Question 11: Numbers that read the same from left to right and right to left are called ___.
a) Primes
b) Palindromes
c) Factors
d) Squares
Answer:
b) Palindromes
Question 12: Which of these is a palindrome?
a) 121
b) 345
c) 678
d) 98
Answer:
a) 121
Question 13: In the “reverse-and-add” method, you stop when ___.
a) You reach a square number
b) You reach a prime number
c) You reach a palindrome
d) You reach 100
Answer:
c) You reach a palindrome
Question 14: Which number is known as the Kaprekar constant?
a) 1234
b) 4321
c) 6174
d) 9999
Answer:
c) 6174
Question 15: Who discovered the Kaprekar constant?
a) Aryabhata
b) D.R. Kaprekar
c) Ramanujan
d) Bhaskara
Answer:
b) D.R. Kaprekar
Question 16: To reach the Kaprekar constant, we start with ___.
a) Any 4-digit number with at least two different digits
b) Any 2-digit number
c) Any 3-digit palindrome
d) Only prime numbers
Answer:
a) Any 4-digit number with at least two different digits
Question 17: On a 12-hour clock, which of these is a palindromic time?
a) 4:12
b) 10:10
c) 7:25
d) 5:30
Answer:
b) 10:10
Question 18: The Collatz conjecture involves repeating which rule?
a) If odd, divide by 2; if even, multiply by 3 + 1
b) If even, divide by 2; if odd, multiply by 3 + 1
c) Always subtract 1
d) Always add 1
Answer:
b) If even, divide by 2; if odd, multiply by 3 + 1
Question 19: According to Collatz’s conjecture, sequences always end at ___.
a) 0
b) 1
c) 2
d) Infinity
Answer:
b) 1
Question 20: Which of these is still an unsolved problem in mathematics?
a) Kaprekar constant
b) Collatz conjecture
c) Pythagoras theorem
d) Place value system
Answer:
b) Collatz conjecture
Question 21: Estimation is useful when ___.
a) We always need the exact number
b) We do not need an exact count
c) Numbers are very small
d) We work only with prime numbers
Answer:
b) We do not need an exact count
Question 22: If there are 32, 29, and 35 students in three sections, the estimate of total students is about ___.
a) 80
b) 90
c) 100
d) 120
Answer:
c) 100
Question 23: The sum of the three angles of a triangle is exactly ___.
a) 90°
b) 120°
c) 180°
d) 360°
Answer:
c) 180°
Question 24: In the game “21”, which player can always win if they play correctly?
a) First player
b) Second player
c) Both players
d) None
Answer:
a) First player
Question 25: In the variation of the game where players add numbers between 1 and 10 to reach 99, which player has the winning strategy?
a) First player
b) Second player
c) Both equally
d) None
Answer:
a) First player
Question 26: A winning strategy in number games usually depends on ___.
a) Guessing randomly
b) Following a pattern of numbers
c) Using only odd numbers
d) Using only even numbers
Answer:
b) Following a pattern of numbers
Question 27: A number pattern that adds digits until reaching the same sum is called ___.
a) Digit sum
b) Factor sum
c) Prime sum
d) Square sum
Answer:
a) Digit sum
Question 28: Which of these is a 5-digit palindrome?
a) 12345
b) 54321
c) 12321
d) 12431
Answer:
c) 12321
Fill in the blanks on Number Play Class 6
1. In the park activity, each child says a number equal to the number of ___ neighbours they have.
Answer:
taller
2. A cell in a table becomes a supercell if its number is greater than all its ___ cells.
Answer:
neighbouring
3. The largest number in a table is not always a ___.
Answer:
supercell
4. The smallest number in a table can also be a supercell if it is greater than its ___.
Answer:
neighbours
5. Numbers like 2180, 2754, and 3050 can be shown correctly on a ___.
Answer:
number line
6. There are exactly ___ one-digit numbers.
Answer:
9
7. The digit sum of 68 is equal to the digit sum of ___.
Answer:
176 (also 545)
8. Among the numbers from 1 to 100, the digit ___ occurs 21 times.
Answer:
7
9. Numbers that read the same forward and backward are called ___.
Answer:
palindromes
10. The number ___ is known as the Kaprekar constant.
Answer:
6174
11. D.R. Kaprekar was a mathematics teacher from ___, Maharashtra.
Answer:
Devlali
12. To find the Kaprekar constant, we start with any ___ number having at least two different digits.
Answer:
4-digit
13. On a 12-hour clock, times like 4:44 or 10:10 are examples of ___ times.
Answer:
palindromic
14. The Collatz conjecture states that the sequence will always eventually reach the number ___.
Answer:
1
15. In the Collatz rule, if the number is odd, you multiply it by ___ and add 1.
Answer:
3
16. Estimation is useful when we do not need an exact count but only an ___ value.
Answer:
approximate
17. If three sections of a class have 32, 29, and 35 children, the estimated total is about ___.
Answer:
100
18. In the game of 21, the player who starts can always ___ if they follow the winning strategy.
Answer:
win
19. In the variation of the game where players add numbers from 1 to 10 to reach 99, the winning strategy belongs to the ___ player.
Answer:
first
