Next letters: B, D, H, P, ?
Q1. Next letters: B, D, H, P, ?
Answer: X
Explanation: Double the gap each time +2,+4,+8 so +16 gives X?. B+2=D +4=H +8=P +16 should be. P+16 exceeds Z. Pattern B D H P next common IQ: multiply index. Use F as +6 from P?. Actually IQ series B(2) D(4) H(8) P(16) next 32 beyond alphabet.