Aspire Faculty ID #14101 · Topic: JAMIA MILLIA ISLAMIA MCA 2019 · Just now
JAMIA MILLIA ISLAMIA MCA 2019

In the following series, how many ‘8’s are there which are not preceded by ‘7’ and followed by ‘9’? 7, 8, 9, 8, 8, 5, 4, 3, 5, 8, 8, 7, 1, 8, 9

Solution

Check each ‘8’: 1️⃣ 7 8 9 → preceded by 7 and followed by 9 ❌ 2️⃣ 9 8 8 → preceded by 9, followed by 8 ✅ 3️⃣ 8 5 4 → ✅ 4️⃣ 5 8 8 → ✅ 5️⃣ 8 7 1 → ❌ followed by 7 6️⃣ 7 1 8 9 → ❌ (preceded by 7, followed by 9) So valid 8’s = 3

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