Question

Which 2 row has the greatest number of primes in it ?
ROW 1
1 2 3 4 5 6 7 8 9 10
ROW 2
11 12 13 14 15 16 17 18 19 20
ROW 3
21 22 23 24 25 26 27 28 29 30
ROW 4
31 32 33 34 35 36 37 38 39 40

Answer 1

ROW 1

Answer 2

http://www.factmonster.com/math/numbers/prime.html - A prime number is one that is only divisible by itself and 1 and nothing else.
Row 1: The prime numbers are 1,2,3,5,7 so that is 5
Row 2: The prime numbers are 11,13,17,19 so that is 4
Row 3: The prime numbers are 23,29 so that is 2
Row 4: The prime numbers are 37 so that is 1.
Which row has the largest number of prime numbers? The first one wins, with 5.

Answer 3

Remember that 1 is not a prime number.

Answer 4

So the first row only has 4 prime numbers in it.

Answer 5

Oh but that would make rows 1 and 2 have an equal number of prime numbers, yielding no answer to the question... :\

Answer 6

Ohhhh never mind. It asked for which TWO rows, not one.