Page 105 - Math Genius C4

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\ 30-Sep-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Chapter assessment

1. Tick () the correct option.
(a) A division fact is written on the blackboard. 90 ÷ 15 = 6.

Riya says, “6 is a factor of 90”.

Siya says, “15 is a factor of 90”.
Who is correct?

(i ) Only Riya is correct. (ii ) Only Siya is correct

(iii ) Both Riya and Siya are correct. (iv) Both Riya and Siya are wrong.

(b) 8, 16, 24, 32, 40 are all ____________.

(i ) multiples of 6 (ii ) multiples of 8
(iii ) factors of 6 (iv) factors of 8

(c) What respective values of a and b will make the given 1020
factor tree true?
(i ) 5, 105 (ii ) 10, 115 2 510

(iii ) 2, 85 (iv) 85, 2 a 255

(d) Which of the following does not divide 3630? 3 b
(i ) 9 (ii ) 10 5 17

(iii ) 2 (iv) 5

2. Write ‘T’ for true and ‘F’ for false for the following statements.

(a) All multiples of 5 are composite numbers.

(b) All odd numbers are prime numbers.
(c) Multiples of a number can be counted whereas

factors of a number cannot be counted.
(d) Numbers that end with 0 or 5 have 5 as their factor

and the numbers are multiples of 5.
(e) A number is either prime or even.

(f) 2 is the only number which is prime as well as even.

3. Fill in the blanks.
(a) The smallest multiple of 2 greater than 28 is ____.

(b) A multiple of 2 but not of 3, less than 12 but greater than 8, is ____.

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