Complete the series: Y, W, T, P, K, E, X, ?, ?
Complete the series: YYZ, VYZ, SYZ, PYZ, ?
Complete the series: Z, S, S, W, O, T, K, Q, G, ? , ?
Complete the series: Z, U, Q, ?, L
Complete the series: Z, W, S, P, L, I, E ?
Complete the series: Z, Y, X, U, T, S, P, O, N, K, ?, ?
Complete the series. -1, 2, -3, 5, -5, 8, -7, ?.
Complete the series. 2, 3, 4, 9, 8, 27, 16, 81, 32, .....?
complete the series. 24, 6, 18, 9, 36, 9, 24, ?
complete the series. 3, 4, 5, 4, 9, 10, 6, 16, 15, 9, 25, 20, 13, 26, ?