Quantitative Aptitude - Arithmetic Ability Questions

Two water squash mixtures, the first with a water-to-squash ratio of 5:1 and the letter with a ratio of 3:1 are blended in the ratio 3:2. What is the final water : squash ratio in the blend?

What is the ratio of simple interest earned on certain amount at the rate of 12% for 6 years and that for 12 years?

A merchant changed his trade discount from 25% to 15%. This would increase selling price by

The average of runs scored by a cricketer in his 99 innings is 99. How many runs will he have to score in his 100th innings so that his average of runs in 100 innings may be 100?

What is the value of xy if x - y = 3 and x2+y2=15?

If the side of a square is increased by 20%, then what will be the percentage increase in its perimeter?

In what ratio does the point T (3,0) divide the segment joining the points S (4,­2) and U (1,4)?

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?