Q. If NO is coded as 210, NOT is coded as 4200 and NOTE is coded as 21000, then how is NOTES coded?
(a) 399000
(b) 420000
(c) 440000
(d) 630000
Correct Answer : (a) 399000
UPSC Prelims 2025 CSAT
Explanation :
We notice that each code is the product of the letters’ positions in the alphabet:
• N = 14
• O = 15
• T = 20
• E = 5
• S = 19
Check the given examples:
1. NO → 14 × 15 = 210
2. NOT → 14 × 15 × 20 = 210 × 20 = 4200
3. NOTE → 14 × 15 × 20 × 5 = 4200 × 5 = 21000
Therefore, for NOTES:
NOTES → 14 × 15 × 20 × 5 × 19
= (14 × 15 × 20 × 5) × 19
= 21000 × 19
= 399000
Answer: (a) 399000
