Question

Which number is composite?

A. 37
B. 43
C. 53
D. 51

Answer 1

hint : if a number is composite, then it will have a prime factor less than or equal to square root of the number

Answer 2

since 53 is ur largest number in the options, sqrt(54) ~ 7+
so test if any prime <= 7 divides any of the given options

Answer 3

I think i get it it now... Thank so much!

Answer 4

np :)
so which one is composite ?

Answer 5

I think B... or 43

Answer 6

Is 43 divisible by any prime <= 7

is 43 divisible by 2, 3, 5 or 7 ?

Answer 7

so 51 is the answer? I'm really bad at math... if you can't tell lol

Answer 8

no you're good :)

Answer 9

and yes ! 51 is a composite number

Answer 10

cuz, 3 goes in 51 evenly

Answer 11

Thanks so much!