Question

Karishma listed all the factors of her age and her brother listed all the factors of his age. They found that the numbers 1, 2 and 3 were there in Both the lists. What could be their ages (in years)? *
1 point
12 and 16
9 and 12
18 and 12
10 and 12​

Answer 1

Answer:

I hope you will find the answer

Answer 2

Given: Karishma list all the factors of her age and her brother listed all the factors of his age. They found that the numbers 1,2 and 3 were there in both the lists.

To find: Their ages from the given options

Explanation: Checking the options given:

(a) 12 and 16

Here factors of 12 - 1,2,3,4,6,12

Factors of 16- 1,2,4,8,16

Here, 1,2 and 3 is not common in both.

(b) 9 and 12

Factors of 9 - 1,3,9

Factors of 12-1,2,3,4,6,12

Here, 1,2 and 3 is not common in both.

(c) 18 and 12

Factors of 18- 1,2,3,6,9,18

Factors of 12-1,2,3,4,6,12

Here, 1,2 and 3 are common in both.

(d) 10 and 12

Factors of 10-1,2,5,10

Factors of 12-1,2,3,4,6,12

Here, 1,2 and 3 are not common in both.

Therefore, their ages are option (c) 18 and 12 because only these two have the factors 1,2 and 3 in common.