Question

2, 4, 8, 16...
a. Add 2 to the previous term; 14, 12
b. Subtract 2 from the previous term; 32, 64
c. multiply the previous term by -2; -32, 64
d. Multiply the previous term by 2; 32, 64

-5, 5, -5, 5...
a. Subtract 10 from the previous term; -5, 5
b. Multiply the previous term by 1; 5, 5
c. Add 10 to the previous term; -5, -15
d. Multiply the previous term by -1; -5, 5

Answer 1

Number 1 is D because 2 times 16 is 32 and 32 times 2 is 64
Number 2 is also D because -1 times 5 is -5 and -5 times -1 is 5