Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
40, 53, 68, ?, 104,125, 148
Option 1: 85
Option 2: 86
Option 3: 72
Option 4: 74
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Correct Answer: 85
Solution :
Given:
40, 53, 68, ?, 104,125, 148
Add consecutive odd numbers starting from 13 in increasing order, to get the missing number in the series –
40 + 13 = 53; 53 + 15 = 68; 68 + 17 = 85; 85 + 19 = 104; 104 + 21 = 125; 125 + 23 = 148
So, 85 is the required missing number in the series. Hence, the first option is correct.
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