3, 7, 15, ?, 63, 127

6, 11, 21, 36, 56, ?

3, 7, 23, 95, ?

Choose the missing terms out of the given alternatives : Y, B, T, G, O, ?

One term in the number series is wrong. Find out the wrong term.<br> 93, 309, 434, 498, 521, 533

One term in the number series is wrong. Find out the wrong term.<br> 1, 3, 10, 21, 64, 129, 356, 777

1, 4, 10, 22, 46, ?

Choose the missing terms out of the given alternatives :1st letter : Z, S, S, W, O, T, K, Q, G, ? , ?

One term in the number series is wrong. Find out the wrong term.<br> 1, 5, 5, 9, 7, 11, 11, 15, 12, 17