Letter Series 26) What is the missing letter in the series, U, O, I, _, A?
Answer: D Explanation: The series contains vowels in reverse order, U, O, I, E, A. So, the missing letter is E. 7) Which letter should come next in the series F,G,H,J,K,L,M,N,P,_?
Answer: A Explanation: The series contains consonants in increasing order, so Q should come next in the series. 8) Find the missing letter in the series, C, G, K, _, S.
Answer: C Explanation: C^{+4}, G^{+4}, K^{+4}, O^{+4}, S^{+4} Therefore, the missing number is (K+4) O. 9) Find the missing pair in the series, EQ, FS, HW, KA, __, TL.
Answer: A Explanation: It is a mixed series. 10) Which letter should come next in the series, Q, J, E, B, _?
Answer: B Explanation: Q^{7}, J^{5}, E^{3}, B^{2}, _ In this series, consecutive prime numbers (in decreasing order) are subtracted from each letter. So, the next number is B  2 = Z. Letter Series 1
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