Question

Insert the missing number: 5, 11, 21. 43....
(a) 85 (b) 86
(c) 87 (d) 88

Answer 1

Heya HERE is your answer

Ur answer is 85

HOPE IT helps you

Answer 2

5,11,21,43,85
gap
6,10,22,42
6*2-2=10
10*2+2=22
22*2-2=42
42+43=85