Question
A sum of money becomes Rs. 9600 in 3 years and Rs. 11200
in 7 years at simple interest. Find the principal.Solution
ATQ, Increase in amount from 3 years to 7 years = 11200 - 9600 = 1600 This is interest for 4 years. So, 1 year's interest = 1600/4 = 400 Interest for 3 years = 3 × 400 = 1200 Principal = 9600 - 1200 = 8400 Hence, the correct answer is Rs.8400.
What should come in place of (?) question mark in the given number series.
81, 73, 66, 60, 55, ?
14 6 4 4 ? 48
...What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
In each of the following number series, one term is missing. Find the missing term.
1, 4, 9, 16, 25, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
156, 182, 210, 240, 272, ?
31    32      35      ?      47       56
...What should come in place of (?) question mark in the following number series.
1, 2, 6, 24, 120, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 244254, ?, 1022, 1150, 1214, 1246
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