Question

A pattern starts with 1. The second number is a 9. The third is a 17. Fourth is a 25 and fifth is 33. If you double the 15th number in the pattern,will the result be even or odd

Answer 1

the number number will be even

Common difference is 8

an = a1 + d(n-1)

a15 = 1 + 8(15-1)

a15 = 1+ 8*14

a15 = 1 +112

a15 =113

double it 226

even number