28, 33, 31, 36, ?, 39

1, 2, 6, 7, 21, 22, 66, 67, ?

Choose the missing terms out of the given alternatives.<br> b e d f ? h j ? l

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

Choose the missing terms out of the given alternatives : R, U, X, A, D, ?

Which term of the series 5, 8, 11, 14,.....is 320?

Choose the missing terms out of the given alternatives :S-4, F-6, H-8, J-10, ?, ?

198, 194, 185, 169, ?

1, 5, 13,25,41,?