Refer to the given series and answer the question that follows (all numbers are single digit numbers only).
Refer to the given series and answer the question that follows (all numbers are single digit numbers only). Counting to be done from left to right only.
दी गई श्रृंखला को से देखिए और नीचे दिए गए प्रश्न का उत्तर दीजिए। (सभी संख्याएँ केवल एकल अंकीय संख्याएँ हैं गिनती केवल बाएँ से दाएँ करनी है।)
(Left) 1 9 9 7 7 5 6 4 3 3 3 1 5 9 7 9 4 9 1 2 5 7 9 5 8 5 2 (Right)
How many such even numbers are there, each of which is immediately preceded by an odd number and also immediately followed by an odd number?
ऐसी कितनी सम संख्याएँ हैं, जिनमें से प्रत्येक के ठीक पहले एक विषम संख्या है तथा ठीक बाद भी एक विषम संख्या है?
Detailed Solution & Logic
3
श्रृंखला (बाएँ से दाएँ):
1 9 9 7 7 5 6 4 3 3 3 1 5 9 7 9 4 9 1 2 5 7 9 5 8 5 2
हमें ऐसी सम संख्याएँ (even numbers) गिननी हैं जिनके:
-
ठीक पहले एक विषम संख्या (odd) हो
-
ठीक बाद भी एक विषम संख्या (odd) हो
सम संख्याएँ: 6, 4, 4, 2, 8, 2
जाँच:
-
6 → पहले 5 (odd) ✔, बाद 4 (even) ❌
-
4 → पहले 6 (even) ❌
-
4 → पहले 9 (odd) ✔, बाद 9 (odd) ✔ ✅
-
2 → पहले 1 (odd) ✔, बाद 5 (odd) ✔ ✅
-
8 → पहले 5 (odd) ✔, बाद 5 (odd) ✔ ✅
-
2 → बाद में कोई संख्या नहीं ❌
योग्य संख्याएँ: 4, 2, 8
कुल = 3
✅ सही उत्तर: Three / तीन
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