Question
A man invested Rs. 20,000 at simple interest of 10% p.a.
If he had instead invested the same sum on compound interest of 10% p.a., compounded annually, then how much more he would have earned as interest after 2 years?Solution
ATQ, Simple interest = Sum × (rate of interest/100) × (time in years) Simple interest earned in two years = 20,000 × (10/100) × 2 = Rs. 4,000 Compound interest earned in two years: = 20,000 × {1 + (10/100)}² - 20,000 = 20,000 × (1.1)² - 20,000 = 20,000 × 1.21 - 20,000 = Rs. 24,200 - 20,000 = Rs. 4,200 So, required difference = 4,200 - 4,000 = Rs. 200
What will come in place of (?) Question mark in the given number series.
5, 26, 68, 131, 215, 320, ?
1, 7, 37, 187, 937, ?
8, ?, 29, 57, 113, 225
30, 42, 54, 66, ?, 90
- What will come in place of the question mark (?) in the following series?
29, 32, 41, 68, ?, 392 226  231   466  ?  5606  28031    Â
- What will come in place of the question mark (?) in the following series?
3, 10, 29, 66, 127, ? What will come in place of the question mark (?) in the following series?
102, 111, 136, 185, 266, ?
15.975 ×27.825 + (76.01)² + 12.98×18.426 = ?+ (79.09)²
23 45 89 155 ? 353
