Question
The ratio of alcohol and water in a container is 3:7.
If 4 litre of alcohol added in it, the ratio of alcohol to water becomes 5:7. Find the initial quantity of mixture in the container.Solution
Let the initial quantity of alcohol and water be 3x and 7x litre respectively. According to the question, => (3x + 4)/7x = 5/7 => x = 2 Therefore, the initial quantity of mixture in the container = 3x + 7x = 10x = 20 liter
18, 34, 70, 134, ?, 378
216, 81, 297, 378, ?, 1035, 1728
Find the missing number in the given number series.
3, 7, 18, 38, 69, ?Find the missing number in the given number series.
4, ?, 110, 665, 4660, 37285
244, 179, 129, 92, 66, ?
16, 20, 47, 63, 188, ?
18 19 34 111 428 2165 ?
...76, 80, 89, 105, ?, 166
48, 24.5, ?, 39.75, 81.5, 206.25, 621.75
6 11 32 111 ? 2345 14100
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