Question
30, 39, 66, ? , 174,
255Solution
30 + 9 × 1 = 39 39 + 9 × 3 = 66 66 + 9 × 5 = 111 111 + 9 × 7 = 174 174 + 9 × 9 = 255
Select the letter triad from the given options which follows the same relation as shown below.
(HK, EH, BE)
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