Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
120, 121, ?, 140, 76, 201
Option 1: 130
Option 2: 113
Option 3: 98
Option 4: 85
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Correct Answer: 113
Solution :
Given:
120, 121, ?, 140, 76, 201
Add and subtract alternatively cube of consecutive natural numbers to obtain the required code –
120 + 1
3
= 121; 121 – 2
3
= 113; 113 + 3
3
= 140; 140 – 4
3
= 76; 76 + 5
3
= 201
So, the required missing number in the series is 113. Hence, the second option is correct.
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