Quantitative Aptitude - Arithmetic Ability Questions

In an alloy, aluminium and tin are in the ratio of 4 : 5. In the second alloy, the ratio of same elements is 4 : 7. If equal quantities of these two alloys be mixed to form a new alloy, then what will be the ratio of both of these elements in the new alloy?

Find out the odd word/letters/number/number pair from the given alternatives.

What is the third proportional to 10 and 25?

The ratio of the number of boys and girls in a school is 3:2. If 20% of the boys and 25% of the girls are scholarship holders, the percentage of the school students who are not scholarship holders is

Weight of A and B are in the ratio 11 : 8. A’s weight increases by 40% and the total weight of A and B increases by 30%. What is the percentage increase in the B’s weight?

If cosθ = x2-y2x2+y2, then the value of cotθ is

If 3 dozen guavas cost Rs. 90, how many guavas can be bought for Rs. 240?

If x - y = -8 and xy = 45, then (x2 + y2) is