CBSE Class 7 Mathematics Number Play MCQs Set A

Question. Which expression can describe all even numbers?
(a) 2n - 1
(b) 2n
(c) 4n + 3
(d) 6n - 4

Answer: B

Question. What is the value of the 100th odd number in the counting sequence?
(a) 100
(b) 200
(c) 199
(d) 201

Answer: C

Question. What is the formula to find the n^th odd number?
(a) 2n
(b) 2n + 1
(c) 2n - 1
(d) n - 1

Answer: C

Question. If two numbers are consecutive, one is always even and the other is always odd. The sum of these two numbers must always be what kind of number?
(a) Even number
(b) Odd number
(c) Always 1
(d) Always 100

Answer: B

Question. Martin and Maria were born one year apart. The sum of their ages is 112. Is this statement possible?
(a) Yes, because 112 is a big number
(b) No, because the sum of consecutive numbers must be odd
(c) Yes, because 112 is an even number
(d) No, because 112 is not divisible by 2

Answer: B

Question. The word parity is used to describe which property of a number?
(a) Positive or Negative
(b) Prime or Composite
(c) Even or Odd
(d) Large or Small

Answer: C

Question. In a 3 x 3 grid using numbers 1 to 9, what must the total sum of the three column sums be?
(a) 15
(b) 90
(c) 45
(d) 100

Answer: C

Question. If a square grid has rows, columns, and diagonals that all add up to the same number, that grid is called a what?
(a) Nice Square
(b) Grid puzzle
(c) Magic Square
(d) Number box

Answer: C

Question. The number 9 cannot be placed in the center of a 3 x 3 magic square using numbers 1-9 because the magic sum of 15 is too small to allow it. This observation is what?
(a) Always True
(b) Never True
(c) Only Sometimes True
(d) Cannot decide

Answer: C

Question. Which two numbers (among 1 to 9) must always be placed in one of the middle boundary positions (not a corner) of a 3 x 3 magic square?
(a) 3 and 7
(b) 4 and 6
(c) 1 and 9
(d) 2 and 8

Answer: C

Question. If a grid has dimensions m x n, and at least one of m or n is an even number, the total number of small squares will have what parity?
(a) Always Odd.
(b) Always Even.
(c) Always Prime.
(d) Always 1.

Answer: B

Question. Which of the following numbers is divisible by 4?
(a) 13
(b) 21
(c) 12
(d) 17

Answer: C

Question. Which expression will always result in an odd number?
(a) 2n
(b) 2n + 4
(c) 4m - 1
(d) 48w - 2

Answer: C

Question. Which of the following expressions can result in both odd or even parity, depending on the value of n?
(a) 3n + 4
(b) 2n
(c) 2n - 1
(d) 100p

Answer: A

Question. The expression that gives the nth even number is what expression?
(a) 2n - 1
(b) n + 2
(c) 2n
(d) n x n

Answer: C

Question. Which number is divisible by 6 but not by 9?
(a) 18
(b) 24
(c) 27
(d) 36

Answer: B

Question. The expression that gives the nth odd number is what expression?
(a) 2n
(b) 2n - 1
(c) n - 1
(d) n + 1

Answer: B

Question. In the cryptarithm UT + TA = TAT, what digit does the letter A stand for?
(a) 1
(b) 9
(c) 0
(d) 5

Answer: C

Question. In the cryptarithm UT + TA = TAT, what digit does the letter U stand for?
(a) 1
(b) 9
(c) 0
(d) 5

Answer: B

Question. Which rule does not check divisibility?
(a) Last digit rule
(b) Sum of digits rule
(c) Prime factor rule
(d) Last two digits rule

Answer: C