Subtopic: Thermodynamic principles of I.C. engines
Question Statement:
Hari (H), Gita (G), Irfan (I) and Saira (S) are siblings, all born on 1st January; the age difference between any two successive siblings is less than 3 years. i. Hari's age + Gita's age > Irfan's age + Saira's age. ii. The age difference between Gita and Saira is 1 year; Gita is not the oldest and Saira is not the youngest. iii. There are no twins. In what order were they born (oldest first)?
Options:
(A) HSIG
(B) SGHI
(C) IGSH
(D) IHSG
Official Answer Key:
B
Step-by-Step Solution & Explanation
Since Gita is not oldest and Saira is not youngest, and their ages differ by only 1 year (so they occupy adjacent birth-order ranks), a consistent ordering is Saira(oldest) > Gita > Hari > Irfan(youngest) — i.e. S, G, H, I. Assigning representative ages respecting <3-year successive gaps (e.g. 10, 9, 7, 5): Gita−Saira = 1 ✓; Gita not oldest ✓ (rank 2); Saira not youngest ✓ (rank 1); and Hari+Gita (7+9=16) > Irfan+Saira (5+10=15) ✓, satisfying clue (i). This uniquely fits all three clues among the given options.
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