Question

(i) Say True or False

(a) The smallest odd natural number is 1.

(b) 2 is the smallest even whole number.

(c) 12345 + 5063 is an odd number.

(d) Every number is a factor of itself.

(e) A number which is a multiple of 6 is also a multiple of 2 and 3.

(ii) Is 7, a factor of 27?

(iii) Is 12, a factor or a multiple of 12?

(iv) Is 30, a factor or a multiple of 10?

(v) Which of the following numbers has 3 as a factor?

(a) 8

(b) 10

(c) 12

(d) 14

(vi) The factors of 24 are 1, 2, 3, __, 6, ___, 12 and 24. Find the missing ones.

(vii) Look at the following numbers carefully and find the missing multiples.

Answer 1

(i) 

(a) True

(b) False

(c) False

(d) True

(e) True

(ii) No, 7 is not a factor of 27. Because 7 does not divide 27 exactly

(iii) 12 is both a factor and a multiple of 12

(iv) 30 is a multiple of 10

(v) 

(a) Factors of 8 are 1, 2, 4, 8

(b) Factors of 10 are 1, 2, 5, 10

(c) Factors of 2 are 1, 2, 3, 4, 6, 12

(d) Factors of 14 are 1, 2, 7, 14

∴ The number 12 has 3 as a factor

(vi) Factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24.

Missing Factors 4, 8.

(vii)