Question

Which of the following numbers is 90 divisible by? 2,3,4,5,6,9,10

Answer 1

2, 3, 5, 6, 9, 10

Explanation:

We are to determine which numbers is 90 divisible by:

`2,3,4,5,6,9,10`

For this, we can use the divisibility rule which helps us find out whether a number is exactly divisible by other numbers (i.e. there is no remainder left).

Divisible by 2:

90 is divisible by 2 since it ends with a 0.

Divisible by 3:

90 is divisible by 3 because 90 is a multiple pf 3.

Divisible by 4:

90 is not divisible by 4 because the last two digits are not a multiple of 4

or the last two digits are not 00.

Divisible by 5:

90 is divisible by 5 since it ends with a 0.

Divisible by 6:

90 is divisible by 6 because it is divisible by 3.

Divisible by 9:

90 is divisible by 9 because it is a multiple of 9.

Divisible by 10:

90 is divisible by 10 since the last digit is 0.

Answer 2

2,3,5,6,9,10

Explanation:

To do this, we can look at how each value divides into 90. If it produces a whole number, they will be consider to be divisible

`90/2=45\\\\90/3=30\\\\90/4=22.5\\\\90/5=18\\\\90/6=15\\\\90/9=10\\\\90/10=9`

This means 4 is the only value that is not divisible into 90