Civil Service Exam Reviewer · Logical Reasoning · medium

Find the missing number: 5 : 24 :: 3 : 8 :: 8 : ?

1. 72
2. 63
3. 129
4. 504

Answer

B. 63

Solution

Rule: each number is paired with n² − 1. Check: 5 → 24 and 3 → 8. So 8 → 63.

More Logical Reasoning questions

1. Find the missing number: 5 : 51 :: 4 : 33 :: 12 : ?
2. Find the missing number: 12 : 169 :: 11 : 144 :: 8 : ?
3. Figure Series 25: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
4. Figure Series 24: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
5. Figure Series 23: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
6. Figure Series 22: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
7. Figure Series 21: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
8. Figure Series 20: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
9. Figure Series 19: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?
10. Figure Series 18: Study the series of four figures in the image. Which option (A, B, C or D) comes NEXT in the series?

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