Same chapter3 marksDifficulty: Medium
Find the sum of the first 20 odd natural numbers.
Sequence and Series
3 marksDifficulty: Medium
Express the recurring decimal 0.777... as a fraction using the sum of an infinite geometric series.
Original Khojo Papers practice question — not from a past board paper.
Answer
7/9
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The decimal is 0.7 + 0.07 + 0.007 + …, a geometric series with a = 0.7 and r = 0.1, whose sum is 0.7 ÷ 0.9 = 7/9.
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