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What is the next letter in the series?
U, F, Q, J, M, N
Let us write the order at which the letters come in the alphabetical series:
U - 21
F - 6
Q - 17
J - 10
M - 13
N - 14
Here, alternate numbers are in A.P. with a common difference of 4.
Like, 21-17-13 and 6-10-14
to continue 21-17-13-9 , next letter in the series will be 'I'.
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