Question
A sum of money doubles itself in 4 years in how many
years it will be 5 times?Solution
Sum of money doubles, means interest is same as principal amount, Let Principal = P So, SI = P Amount = P + SI = P + P = 2P => A = P + (PRT/100) => 2P = P + (P×R×4)/100) => 200 = 100 + R × 4 => 100 = R × 4 => R = 25% According to the question, => 5P = P + (P×25×T)/100) => T = 16 years
- What will come in place of the question mark (?) in the following series?
5, 15, 35, 75, 155, ? 21, 37, 73, 137, ?, 381
What value should come in the place of (?) in the following number series?
14, 43, 132, 401, 1210, ?, 10928
- What will come in place of the question mark (?) in the following series?
10, 17, 26, 37, 50, ? What will come in place of the question mark (?) in the following series?
1528, 1416, 1204, ?, 480, -32
What will come in place of the question mark (?) in the following series?
562, 56...
4, 4, 12, 60, ?, 3780
1, 7, 25, 61, ?
580 557 528 497 ? 419
What will come in place of the question mark (?) in the following series?
2, 5, 14, 41, 122, 365, ?
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