Quantitative Aptitude - Arithmetic Ability Questions

The average of marks of 17 students in an examination was calculated as 71. But it was later found that the mark of one student had been wronglyentered as 65 instead of 56 and another as 24 instead of 50. The correct average is

If 5x + 1/x = 10, then x2 + 125x2 is equal to

What will be the acute angle between the hour-hand and the minute -hand at 2:13 p.m?

If angles of measure (5y + 62°) and (22° + y) are supplementary , then value of y is

A shopkeeper, sold walnuts at the rate Rs 1,190 a kg and bears a loss of 10%. Now if he decides to sell it at Rs 1,249.5 per kg, what will be the result?

What will be the net discount (in %) of two successive discounts of 15% and 35%?

If a + b = ­ 8 and a2 + b2 = 34, then value of ab is

What is the least number of complete years in which a sum of money put out at 40% annual compound interest will be more than trebled?