Question

Ruben owns a hardware store and is looking over his past orders. Ruben's hardware store ordered 5 power drills in May, 6 power drills in June, 9 power drills in July, 14 power drills in August, and 21 power drills in September. If this pattern continues, how many power drills will the store order in October?

Answer 1

there is a difference of odd no.
so 21+9=30