Quantitative Aptitude - Arithmetic Ability Questions

In a class of 56 students there are 28 girls. The average weight of these girls is 46 kg and average weight of the full class is 51 kgs. What is the average weight of the boys of the class?

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?

X is 25% more efficient than Y. If Y alone can make a chair in 10 days, then X alone can make the chair in how many days?

If cosA + cos2A = 1 then the value of sin2A + sin4A is

What is the sum of all natural numbers between 100 and 400 which are divisible by 13?

The solution set of 4x -­ 3y = 10 and 3x + y = 14 is

If on an item there is 12% discount on the marked price of Rs 10,000 but the item is sold at Rs 8,360 only then what additional discount (in %) did the customer get?

­ If the selling price of an item is Rs 1150 after getting a discount of 8%, what is its marked price?