Question
'Q' spends 25% of his monthly income on rent, 40% on
groceries, and 15% of the remaining amount on entertainment. He saves the rest of the money in a fixed deposit that gives simple interest at a rate of 8% per annum. Find the amount 'Q' will get at the end of the year if his spending on entertainment is Rs. 900 per month.Solution
Let monthly income = Rs. 100y Spending on rent = 100y × 0.25 = Rs. 25y Spending on groceries = 100y × 0.4 = Rs. 40y Spending on entertainment = (100y – 25y – 40y) × 0.15 = Rs. 5.25y Savings = 100y – 25y – 40y – 5.25y = Rs. 29.75y Now, 5.25y = 900 Or, 29.75y = 5100 Total interest paid by the fixed deposit: = P × r × t = 5100 × 8 × 1/100 = Rs. 408 Amount = 5100 + 408 = Rs. 5508
30, 43, 58, 75, 94, ?
106, 124, 88, 142, ?, 160
Find the missing number in the given number series.
2, 5, 16, 65, 326, ?25, ?, 87, 159, 269, 425Â
What will come in place of the question mark (?) in the following series?
15, 90, 450, ?, 5400, 10800Â
31Â Â Â 40Â Â Â 51Â Â Â 64Â Â Â 79Â Â Â Â ?
7    8     ?     13     17     22    28
...16, 24, 36, ?, 81, 121.5
5, 18, 39, 68, 105, ?
25   25   37.5   ?   328.125   1804.6875