Question

Which number is not divisible by either of the numbers 3 and 5?

A. 5000
B. 2374
C. 1203
D. 2505

Answer 1

try dividing each number but 3 and 5 and which one that doesnt divide down with out a deciamal is your answer

Answer 2

A, B

Answer 3

From Mathematica:
{5000, 2374, 1203, 2505} // FactorInteger
{{{2, 3}, {5, 4}},
{{2, 1}, {1187, 1}},
{{3, 1}, {401, 1}},
{{3, 1}, {5, 1}, {167, 1}}}
{a,b} is a^b

Answer 4

B. is not divisible by either 3 or 5.

Answer 5

The answer is B.
Here is a helpful tip-trick: To figure out if a number is divisible by 3, you can add the numbers and see if the total is number is a factor of 3.
Example: Can 2436 be divided by 3 with no remainders?
2 + 4 + 3 + 6 = 15
15 is a factor of 3; 5 x 3 = 15
So if you divide 2436 by 3 your answer will be 812; a whole number.

I'm sure you already know that any number divisible by 5 either ends in a 5 or a 0. Always.

Try solving your problem using the tip-trick I showed you.