Question
A vessel contains 250 litres mixture of water and milk
in the ratio 3:7 respectively. (y+20) litres of water added in the mixture, so the new ratio of milk to water becomes 5:4. If ‘y’ litres of pure milk added in the initial mixture, then find the ratio of water to milk in the resultant mixture.Solution
Initial quantity of water = 250 × (3/10) = 75 litres Initial quantity of milk = 250 × (7/10) = 175 litres According to the question, => (75 + y + 20)/175 = 4/5 => 475 + 5y = 700 => 5y = 225 => y = 45 Required ratio water to milk in the resultant mixture = 75/(175 + 45) = 15:44
612, 487,?, 396, 388, 387
Find the missing number in the given number series.
1, 2, 6, 24, 120, ?What will come in place of the question mark (?) in the following series?
36, 85, ?, 230, 330, 451
Find the missing term in the series:
2, 5, 11, 23, 47, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
44   45    41   50    ?      59    23
...221, 100, 0, -81, ?
...900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
16, 20, 11, 27, ?, 38
37, 57, 82, ?, 147, 187
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