Question

Show that there are no prime numbers from 200 to 210.

Answer 1

Test them...

Answer 2

But there are prime numbers so what do i do ?

Answer 3

Well, you can knock out all the even numbers for a start...

Answer 4

then ?

Answer 5

If digits of a number sum to a multiple of 3, then then the number is divisible by 3...

Answer 6

wait nvm sorry i get it now . LOL

Answer 7

)

Answer 8

wait one more question . whats the divisibility rule for 7 ?

Answer 9

That's a messy one, read it here http://en.wikipedia.org/wiki/Divisibility_rule#Divisibility_by_7

Answer 10

Thank you

Answer 11

ur welcome (might be quicker to just eyeball it for this small set)