Question : Directions: Which number will replace the question mark (?) in the following series?
28, 30, ?, 188, 754, 3772
Option 1: 120
Option 2: 62
Option 3: 60
Option 4: 122
Correct Answer: 62
Solution :
Given:
28, 30, ?, 188, 754, 3772
Multiply the number by consecutive natural number and add 2 to the resultant, to get the required missing number –
(28 × 1) + 2 = 28 + 2 = 30
(30 × 2) + 2 = 60 + 2 = 62
(62 × 3) + 2 = 186 + 2 = 188
(188 × 4) + 2 = 752 + 2 = 754
(754 × 5) + 2 = 3770 + 2 = 3772
So, 62 is the required missing number in the series. Hence, the second option is correct.
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