Question
A mixture contains 70 litres of milk and the rest water
such that the ratio of the quantity of milk to that of water in the mixture is 7:3. How many litres of water should be added to the mixture such that milk constitutes 35% of the resultant mixture?Solution
ATQ, Total quantity of initial mixture = 70 × (10/7) = 100 litres Since the quantity of milk remains unchanged, therefore Total quantity of resultant mixture = (70/0.35) = 200 litres Therefore, the quantity of water added = 200 - 100 = 100 litres
What will come in place of the question mark (?) in the following series?
77, 198, 342, 511, 707, ?
107    157    194    ?     237    247
...3    8    26    93    ?   1985   11940
...257, 399, 566, ?, 983, 1237Â
246, 102, 202, ?, 174, 158
9    14    38    129    ?   2705   16260
...155, 161, 173, 191, ?, 245
79Â Â Â Â Â 86Â Â Â Â Â Â 76 Â Â Â Â Â Â 89Â Â Â Â Â Â 73 Â Â Â Â Â Â ?
...- What will come in place of (?) in the given number series.
729, 243, 81, 27, ?, 3 135, 148, ?, 184, 207, 236
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