Quantitative Aptitude - Arithmetic Ability Questions

After 10 innings the average score per innings of a batsman was 52. After 12 innings the average rose to 54. If the batsman had scored 16 more runs in the 12th innings than in the previous one, how many runs did he score in the 11th innings?

The mean score in a test of the 12 boys in a class was 16 while the overall mean of the 30 students in the class was 18.1. What was the mean score of the girls?

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

Arjun and Anurag complete a job in 6 days and 7 days respectively. They worked together and earned a total of Rs. 780. Find Arjun's share in this amount in Rs. ?

If (1 - sinA)/(1 + sinA) = x, then x is

A sum of Rs 10000 becomes Rs 14641 when invested at compound interest at the yearly interest rate of 20% per annum. If the compounding is done half yearly, then for how many years was the sum invested?

What is the compound interest on Rs. 48,000 for 2 years at 20% p.a., if interest is compounded annually?

What should be added to 3(x­ - 2y) to obtain 2(3x + y) -­ 5(2x + 3)?