Ali must choose a number between 49 and 95 that is a multiple of 2 , 4 , and 5 . Write all the numbers that he could choose.

Question

Ali must choose a number between
49
and
95
that is a multiple of
2
,
4
, and
5
. Write all the numbers that he could choose.

Answer 1

Any number that's a multiple of 4 and 5 also has to be a multiple of 20.

 

And any multiple of 20 is also a multiple of 2.  So if you pick the multiples of 20, that will cover all three of the numbers -- 2, 4, and 5.

 

The multiples of 20 that are between 49 and 95 are 60 and 80.