Question
In a chemistry lab two beakers A and B contains 36% and
40% of spirit respectively. If two liters from A is mixed with 4 liters of B. The ratio of spirit and water in the resulting mixture is:Solution
A has 36% spirit, Amount of spirit in 2 liters of A = 0.36 × 2 = 0.72 liters B has 40% spirit, Amount of spirit in 4 liters of B = 0.4 × 4 = 1.6 liters Total amount of mixture = 2 + 4 = 6 liters Amount of spirit in the final mixture = 0.72 + 1.6 = 2.32 liters Amount of water in the final mixture = 6 – 2.32 = 3.68 Required ratio = 2.32 : 3.68 = 29 : 46
What will come in place of (?) question mark in the given number series.
16, 24, 51, 115, 240, ?
Find the missing number in the given number series.
512, 128, 32, 8, ?, 171, 79, 88, 152, ?, 393
15, 31, 67, 131, ?, 375
1, 26, 75, 156, 277, ?
7 29 61 ? 211 349
...18   29   16   31   ?   33
72, 82, 62, 102, 22, ?
?, 15, 45, 225, 1575, 14175
166    156    136   ?     66    16
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