Same chapter3 marksDifficulty: Medium
Find the sum of the first 20 odd natural numbers.
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3 marksDifficulty: Medium
The third term of a geometric progression is 12 and the sixth term is 96. Find the first term and the common ratio.
Original Khojo Papers practice question — not from a past board paper.
Answer
a = 3 and r = 2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Dividing ar5 = 96 by ar2 = 12 gives r3 = 8, so r = 2 and a = 12 ÷ 4 = 3.
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