Question
In a mixture containing a certain quantity of pure
alcohol, 20% of the alcohol is removed from the container and replaced with an equal amount of water. Subsequently, 25% of the mixture is withdrawn and replaced with the same quantity of water. Determine the ratio of alcohol to water in the resulting mixture.Solution
ATQ, Let, the initial quantity of pure alcohol be 'a' litres. Quantity of alcohol in the resultant mixture = a × 0.80 × 0.75 = 0.6a litres Quantity of water in the resultant mixture = a - 0.6a = 0.4a litres So the desired ratio = 0.6a: 0.4a = 3:2
Which two signs should be interchanged to make the given equation correct?
912 – 456 × 28 + 390 ÷ 2 = 444
What should come in place of the question mark (?) in the given series?
42, 48, 54, 60, 66, ?
Select correct combination of mathematical signs to sequentially replace the letter Y and balance the following equation.
52 Y 13 Y 16 Y 32 Y 2
Which of the following numbers will replace the question mark (?) in the given series?
90, 110, 132, ? , 182
From the given option figures, select the one in which the question figure is hidden/embedded. (Rotation is NOT allowed)
Select the term that will come next in the following series.
A12B, D15E, G18H, J21K, ?
In a code language, 'COUCH' is coded as FLXZK and 'TABLE' is coded as WXEIH. How will 'CHAIR' be coded in the same language?
In a code language, 'PALM' is coded as 16-1-12-13 and 'HEAD' is coded as 8-5-1-4. How will 'NECK' be coded in the same language?
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How many pages of book Z did Sania read on Sunday?
Statement 1 – The book has 300 pages out of which two-thirds were read by her before Sunday<...
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