Find the missing number in the given series? 4, 16, 40, ?

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RRB NTPC Exam 25 Jan, 2021 click here to view all questions

Find the missing number in the given series? 4, 16, 40, ?

A87

B88

C89

D90

Akhilesh ? Apr 4 '25 at 22:11

correct answer is: option b (88)
Explanation: The pattern in the series is as follows: The difference between consecutive numbers increases by multiples of 12.
16 - 4 = 12
40 - 16 = 24 (12 * 2)
So the next difference should be 12 * 3 = 36.
Therefore, the next number is 40 + 36 = 76 + 12=88

• Option a: 87 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12.
• Option b: 88 is correct because 40 + (12*3) = 40 + 36 = 76. So, the number is 40+48=88
• Option c: 89 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12.
• Option d: 90 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12.

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correct answer is: option b (88) Explanation: The pattern in the series is as follows: The difference between consecutive numbers increases by multiples of 12. 16 - 4 = 12 40 - 16 = 24 (12 * 2) So the next difference should be 12 * 3 = 36. Therefore, the next number is 40 + 36 = 76 + 12=88 Option a: 87 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12. Option b: 88 is correct because 40 + (12*3) = 40 + 36 = 76. So, the number is 40+48=88 Option c: 89 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12. Option d: 90 is incorrect because it does not follow the established pattern of differences increasing by multiples of 12. Akhilesh ? answered Apr 4 '25 at 22:11

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