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UPSC Prelims 2025CSATGeneral Mental AbilityCoding-Decoding - Letter-Number Coding

Q66. 66. If NO is coded as 210, NOT is coded as 4200 and NOTE is coded as 21000, then how is NOTES coded?

A. 399000✓ Correct
B. 420000
C. 440000
D. 630000

Detailed Solution

✓ Correct Answer: Option A

Let's analyze the pattern using the alphabetical position of letters (A=1, B=2, ..., Z=26). * N = 14, O = 15 NO = 14 × 15 = 210. This matches the given code. * N = 14, O = 15, T = 20 NOT = 14 × 15 × 20 = 210 × 20 = 4200.

This matches the given code. * N = 14, O = 15, T = 20, E = 5 NOTE = 14 × 15 × 20 × 5 = 4200 × 5 = 21000. This matches the given code. The pattern is to multiply the alphabetical positions of the letters in the word.

Now, apply this to NOTES: N = 14, O = 15, T = 20, E = 5, S = 19 NOTES = 14 × 15 × 20 × 5 × 19 We already calculated NOTE = 21000. So, NOTES = 21000 × 19 = 399000. This question tests pattern recognition in coding-decoding, a standard reasoning aptitude.

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