Question

SHLRI
Find the next number in the series.
3, 7, 13, 21, ...​

Answer 1

Answer:

31

Step-by-step explanation:

$3 + 4 = 7 \\ 7 + 6 = 13 \\ 13 + 8 = 21 \\ therefore \: \: \\ 21 + 10 = 31$

Answer 2

Answer:

31

Step-by-step explanation:

3+4 =7

7+6=13

13+8=21

21+10=31