Refer to the following series and
Refer to the following series and answer the question. (Counting to be done from left to right only)(All numbers are single-digit numbers only).
निम्नलिखित श्रृंखला का संदर्भ लीजिए और उसके नीचे दिए गए प्रश्न का उत्तर दीजिए।
गिनती केवल बाएँ से दाएँ की जानी है। (सभी संख्याएँ केवल एकल-अंकीय संख्याएँ हैं।)
(Left) 9 8 7 6 5 4 3 2 1 3 9 8 7 6 (Right)
How many such even numbers are there, each of which is immediately preceded by an odd number and immediately followed by an odd number?
ऐसी कितनी सम संख्याएँ हैं, जिनके ठीक पहले एक विषम संख्या और ठीक बाद में भी एक विषम संख्या है?
Detailed Solution & Logic
More than three
Step 1: Write the series clearly
Series (from left to right):
9, 8, 7, 6, 5, 4, 3, 2, 1, 3, 9, 8, 7, 6
Even numbers in this series: 8, 6, 4, 2, 8, 6
Step 2: Check the condition
We need even numbers that are immediately preceded and followed by odd numbers:
-
8 (2nd position) → preceded by 9 (odd ✅), followed by 7 (odd ✅) → counts
-
6 (4th position) → preceded by 7 (odd ✅), followed by 5 (odd ✅) → counts
-
4 (6th position) → preceded by 5 (odd ✅), followed by 3 (odd ✅) → counts
-
2 (8th position) → preceded by 3 (odd ✅), followed by 1 (odd ✅) → counts
-
8 (12th position) → preceded by 9 (odd ✅), followed by 7 (odd ✅) → counts
-
6 (14th position) → preceded by 7 (odd ✅), but no number after it (❌) → does not count
Step 3: Count
Numbers that satisfy the condition: 8, 6, 4, 2, 8 → 5 numbers
Step 4: Match with given options
Options:
-
One
-
Two
-
Three
-
More than three ✅
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