Question

4,9,19,39,79 what is the n4,9,19,39,79 what is the next number

Answer 1

Answer:

Next number is 159

Step-by-step explanation:

$4 \times 2 + 1 = 9$

$9 \times 2 + 1 = 19$

$19 \times 2 + 1 = 39$

$39 \times 2 + 1= 79$

$79 \times 2 + 1 = 159$