Question
Divide Rs 2500 into two parts such that the interest on
one part at 12% for 2 years equals the interest on the other part at 6% for 4 years. Find the two parts.Solution
ATQ, Let 'c' be the sum at 12% and (2500 − c) at 6%. Equating the interest:- 
On Simplifying:- 24c = {(2500 × 24) - 24c} 24c = 60,000 - 24c 48c = 60,000 c = 60,000/48 c = 1250 The two sums are Rs 1250 and Rs 1250.
What will come in place of the question mark (?) in the following series?
21, 36, 66, 126, ?, 486
124, 180, 108, 198, ?, 220
30, 42, 54, 66, ?, 90
What should come in place of (?) question mark in the given number series.
5, 11, 23, 47, 95, ?
625, 125, 375, 75, 225, 45, ?
In each of the following series, one term is missing. Find the missing term.
2, 6, 15, 31, 56, ?
25   25   37.5   ?   328.125   1804.6875
31, 60, 118, 234, 466, ?
7.5% of 820.68 - 95% of 945.06 + 12.8% of 1050= ?
What will come in place of the question mark (?) in the following series?
12, 13, 27, ?, 329, 1646
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