Quantitative Aptitude - Arithmetic Ability Questions

A invested an amount of x rupees in a bank for 2 years which gave 5% interest in year 1 and 6% interest in year 2. The amount received after 2 years is Rs 24,486. What is the value of x?

The average of 100 items was found to be 30 . If at the time of calculation , two items were wrongly taken as 32 and 12 instead of 23 and 11 , then the correct average is

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is

If 1/3(12x/5 - 1/2) + 6/5 = 7/6, then what is the value of x?

At 22% discount the selling price of a refrigerator is Rs 26000, what is the selling price if the discount is 40%?

What is the difference (in Rs) between the compound interests on Rs. 4000 for 1 year at 12% per annum compounded yearly and half-yearly?

What is the area (in sq cm) of a rectangle if its diagonal is 25 cm and one of its sides is 24 cm?

What number should be added to each of the numbers 55, 100, 65 and 116, so that the resulting numbers are in continued proportion?