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Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?AAA 5, BCD 10,
Question

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
AAA 5, BCD 10, CEG 15, DGJ 20, ?​

A.

EIM 25

B.

EKM 25

C.

ETM 25

D.

EGM 25

Correct option is A

Given: AAA 5, BCD 10, CEG 15, DGJ 20, ?
Logic: 1st letter + 1, 2nd letter + 2, 3rd letter + 3 and number is increasing + 5 place.
For, 1st letter
A + 1 = B, B + 1 = C, C + 1 = D, D + 1 = E
For, 2nd letter
A + 2 = C, C + 2 = E, E + 2 = G, G + 2 = I
For, 3rd letter
A + 3 = D, D + 3 = G, G + 3 = J, J + 3 = M
For, number
5 + 5 = 10, 10 + 5 = 15, 15 + 5 = 20, 20 + 5 = 25
So, the missing term is EIM 25.
Thus, correct option is (a).

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