Question

Which number is divisible by 3 and 5 a. 130 b. 325 c. 4113 d. 2040

Answer 1

A number that is divisible by 5 is one that ends with either a 5 or 0.  To find a number that is divisible by 3 add up the digits and if they are divisible by 3, the number also is.  That rules c out because it doesn't end with a 5 or 0.  130 and 325 won't work because they are not divisible by 3.  The answer would be 2040.