Question : Directions: Which of the following numbers will replace the question mark (?) in the given series to make it logically complete?
12, ?, 68, 194, 572, 1706
Option 1: 32
Option 2: 36
Option 3: 26
Option 4: 20
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Correct Answer: 26
Solution :
Given:
12, ?, 68, 194, 572, 1706
Multiply each number by 3 and subtract 10 from the resultant, to get the required missing number.
(12 × 3) – 10 = 36 – 10 = 26
(26 × 3) – 10 = 78 – 10 = 68
(68 × 3) – 10 = 204 – 10 = 194
(194 × 3) – 10 = 582 – 10 = 572
(572 × 3) – 10 = 1716 – 10 = 1706
So, 26 is the missing term in the series. Hence, the third option is correct.
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