I am tring to figure out which of these numbers have neither 2 nor 5 as a factor?

Question

1.125
2.251
3.512
4.215

Answer 1

Any number multiplied by 2 will produce a number ending with an even digit. Examples: 2, 4, 6, 8, 16, 50, etc.

Any number multiplied by 5 will produce a number ending with either 0 or 5.
Examples: 5, 10, 25, 50, 95, etc.

Which of your choices ends with an odd number that is not 5?

Answer 2

thank you Ms.Sue:)