Question

6,15,35,?,143,221 answer is 77 how? any one can u solvevthis​

Answer 1

Answer:

Double the previous no. and add odd numbers from 3 to 11

Step-by-step explanation:

Verification for :

6 ) 6×2 = 12 + 3 =15

15 ) 15 ×2 = 30 +5 = 35

35 ) 35 ×2 = 70 +7 =77