Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
14, 45, 138, ?, 1254
Option 1: 170
Option 2: 211
Option 3: 451
Option 4: 417
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Correct Answer: 417
Solution :
Given:
14, 45, 138, ?, 1254
Multiply the previous term by 3 then add 3 to obtain the next term.
(14 × 3) + 3 = 42 + 3 = 45; (45 × 3) + 3 = 135 + 3 = 138; (138 × 3) + 3 = 414 + 3 = 417; (417 × 3) + 3 = 1251 + 3 = 1254
So, 417 is the missing term in the given series. Hence, the fourth option is correct.
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