Question
In a vessel the ratio of alcohol to water is 6:1. If 21
liter of mixture is taken out from the vessel and 1 liter water is added, then the ratio of alcohol to water in the final mixture becomes 21:4. Then, what will be the initial quantity (in liters) of alcohol in the vessel?Solution
ATQ, we can say that Let the initial alcohol & water in vessel be 6x & x liters respectively. So, {(6x − 21 × 6/7)}/{(x − 21 × 1/7 +1)} = 21/4 (6x−18)/(x−3+1) = 21/4 24x − 72 = 21x − 42 3x = 30 x = 10 liters  Initial the quantity of alcohol in vessel = 6x = 60 liters
What should come in place of (?) question mark in the given number series.
2, 6, 15, 31, 56, ?
98, 89, 114, 50, 194, ?
13    13      26       ?      832       13312
...- What will come in place of the question mark (?) in the following series?
6, 6, 9, ?, 32, 56 What will come in place of the question mark (?) in the following series?
72, 78, 90, ?, 132, 162
Find the missing number in the given number series.
2, 5, 11, 23, 47, ?101, 103, 107, 109, 113, ?
250 Â Â Â 25 Â Â Â Â 5 Â Â Â Â ? Â Â Â Â 0.6 Â Â Â Â Â 0.3
What will come in place of the question mark (?) in the following series?
60, 110, 224, 463, ?, 1716
What will come in place of the question mark (?) in the following series?
24, 25, 34, 59, 108, 189, ?
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