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E:\Working\Focus_Learning\Math_Genius_4_(25-10-2023)\Open_Files\Chap-05
\\December 6, 2023 12:53 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Chapter assessment
1. Choose 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?
2 510
(i) 5,105 (ii) 10, 115

(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, lesser than 12 but greater than 8, is ____.
(c) A multiple of 5, 6 and 10, greater than 40 but less than 80, is ____.

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