Question

Complete the series 1,3,10,21,64,129,?,777

Answer 1

Answer:

The answer is 388.

Step-by-step explanation:

The series follows *2+1,*3+1 pattern.

1*2+1=3

3*3+1=10

10*2+1=21

21*3+1=64

64*2+1=129

129*3+1=388

388*2+1=777.

Therefore the number is 388.

Answer 2

Answer:

Step-by-step explanation:I have attached an image ...I hope it helps you