Quantitative Aptitude - Arithmetic Ability Questions

X does 25% of a work in 20 days. Y joins X and they together finish the remaining work in 15 days. Y alone can do the whole work in ___ days.

In a container, two types of liquids P and Q are in the ratio of 3 : 7. If 10 litres mixture is drawn off from the container and filled with 6 litres of liquid Q,then the ratio of P and Q becomes 1 : 3. What was the original quantity (in litres) of mixture?

The average marks of 40 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37. What is the value of correct average?

If SinX-CosX=1, where 'X' is an acute angle, the value of SinX+CosX is

If a3 + b3 = 35 and ab = 6, then what is the value of a + b?

If x3 – 4x2 + 19 = 6(x – 1), then what is the value of [x2 + (1/x – 4)]?

Square of (3x – 5xy) is

If x2 + y2 + 6x + 5 = 4(x - y) then x - y is