If 5472 → 9, 6342 → 6, 7584 → 6 and 9237 → P, then P is: (→ means implies)
2020
If 5472 → 9, 6342 → 6, 7584 → 6 and 9237 → P, then P is: (→ means implies)
- A.
2
- B.
3
- C.
4
- D.
5
Attempted by 23 students.
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Correct answer: B
The rule is to add the digits of the number and then add again until a single digit is obtained. For example, 5472 gives 5 + 4 + 7 + 2 = 18 and 1 + 8 = 9. Similarly, 6342 gives 15 → 6 and 7584 gives 24 → 6. For 9237, 9 + 2 + 3 + 7 = 21 and 2 + 1 = 3. Therefore, P = 3.