Question
The difference between compound interest and simple
interest at rate of 28% per annum for 2 years is Rs. 392. Find the simple interest obtained on same amount for a period of 2 years at rate of 10% per annum.Solution
Let, the amount be Rs. P. P[(1 + 28/100)2 – 1] – P × 28% × 2 = 392 P × 0.6384 – P × 0.0784 = 392 P × 0.0784 = 392 P = 392 ÷ 0.0784 = Rs. 5000 Therefore, required interest = 5000 × 10% × 2 = Rs. 1000
Find the missing number in the given number series.
2, 5, 16, 65, 326, ?6400, 1600, ?, 80, 16, 4
What value should come in the place of (?) in the following number series?
14, 18, ?, 43, 68, 104
106, 124, 88, 142, ?, 160
In each of the following series, one term is missing. Find the missing term.
5, 13, 29, 61, 125, ?
580 557 528 497 ? 419
What will come in place of the question mark (?) in the following series?
47, 56, 120, 145, ?, 410
16, 20, 47, 63, 188, ?
12, 19, 32, ?, 76, 107
165      155     135     ?     65      15
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