Question

What is the answer to this question

Answer 1

3) 124

Explanation:

a1 = 10

a2 = a1+6 = 10+6 = 16

a3 = a2+6 = a1+6+6 = a1 + 2×6 = 22

a4 = a3+6 = a2+6+6 = a1+6+6+6 = a1 + 3×6 = 28

...

=>

an = an-1 + 6 = a1 + 6(n-1)

=>

a20 = a1 + 6(20-1) = 10 + 6×19 = 10+114 = 124