Find the odd man out. 15,25,30,51,85,90,115 A. 15 B. 25 C. 51 D. 90

51

Others can divided for five but this

The answer is C. 51 because we can see that all of the numbers are divisble by 5 except for 51

an easy way to tell is if the number ends in 0 or 5, it is divisible by 5

51 is the only one that doesn't end in 0 or 5 so it isn't divisible by 5 (it's divisible by 3 and 17)

the answer is C. 51