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A 3 digit number when divided by 5 gives an even number. When it is divided by 3  it also gives an even number.
(a) what is the digit in the ones place ?
(b) what can the number be ?

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Sagot :

a) 0
b) 150
    180
    210
    ...

First thing to know is the only numbers divisible by 5 are those ending in 5 and 0. But it says that it gives an even number when divided by 5, so it should end in 0.

Then, just look for a three digit number that ends in 0 and the sum of the two remaining digits are a multiple of 3.