Question
A man has 20 liters of pure alcohol. To make a 75%
profit while selling it at the original cost price of alcohol, how many liters of water should he mix with the alcohol?Solution
Pure alcohol = 20 litres Quantity of water to be added = 20 x 0.75 = 15 litres
200 ? 96 38.4 7.68 0
What will come in place of the question mark (?) in the following series?
77, 198, 342, 511, 707, ?
56, 27, 14.5, 6.25, ?, 1.0625
12, 12, 30, 120, ?, 4620
7 7 ? 43 163 831
...10,14,26,42,70,?
96, 144, ?, 324, 486, 729, 1093.5
What will come in place of the question mark (?) in the following series?
112, 116, 121, ?, 134, 142
What will come in place of the question mark (?) in the following series?
7, 20, 59, 176, 527, 1580, ?
31Â Â Â 40Â Â Â 51Â Â Â 64Â Â Â 79Â Â Â Â ?