- A4965
- B6457
- C8495
- D7859
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Concept: Find a word common to two coded sentences; the digit common to their codes is its code.
- "book" is in all three sentences; 9 is in all three codes, so book = 9.
- "This" and "book" are common to sentences 1 and 2; common digits 6, 9 → This = 6, so Read = 8.
- "Useful", "book", "is" are common to sentences 2 and 3 → their codes are 9, 7, 5; leftover in sentence 3: good = 4.
- This book is good = 6, 9, (7 or 5), 4. Only 4965 has 6, 9, 4 and one of 7 or 5 (and no 8).
Trick: Eliminate options containing a known wrong code: 8 (Read) removes C and D; B has no 9 (book).
Answer: (A) 4965
अवधारणा: दो वाक्यों में common शब्द का code उनके codes में common अंक होता है।
- "book" तीनों वाक्यों में है, अंक 9 तीनों codes में है → book = 9.
- वाक्य 1 और 2 में "This", "book" common हैं; common अंक 6, 9 → This = 6, Read = 8.
- वाक्य 2 और 3 में "Useful", "book", "is" common → codes 9, 7, 5; वाक्य 3 में बचा good = 4.
- This book is good = 6, 9, (7 या 5), 4 → केवल 4965 सही बैठता है।
ट्रिक: जिस option में 8 (Read) है या 9 (book) नहीं है, उसे तुरंत हटाएँ।
उत्तर: (A) 4965
