Question

Debbie has a pack of cards numbered from 1 to 20. She picks four different number cards. Exactly three of them are multiples of 5.Exactly three of them are even. All four of the numbers add up to less than 40

Answer 1

2, 5, 10, and 20 are a possibility.

Answer 2

Explanation:

Given that Debbie has a pack of cards numbered from 1 to 20. She picks four different number cards. Exactly three of them are multiples of 5.Exactly three of them are even. All four of the numbers add up to less than 40

3 of them are multiples of 5 and 3 of them are multiples of 2.

Hence atleast two should be multiples of 10

Hence 10,20 are two numbers

Since sum is less than 40 multiple of 5 can be only 5

Next number can be 2 or 4

Hence the numbers would be

2,5,10,20 or

4,5,10,20