Quantitative Aptitude - Arithmetic Ability Questions

The simple and compound interest that can be earned in two years at the same rate is Rs 1,000 and Rs 1,040 respectively. What is the rate (percent per annum) of interest?

35% of an alloy was silver. If in the quantity of alloy there was 119 g of silver, what was the quantity of the elements in the alloy?

The average revenues of 13 consecutive years of a company is Rs 78 lakhs. If the average of first 7 years is Rs 73 lakhs and that of last 7 years is Rs 85 lakhs, what is the revenue for the 7th year?

If a + b = 17 and a - b = 9 then the value of (4a2 + 4b2) is,

The salary of a person is reduced by 20% . To restore the previous salary, his present salary is to be increased by

If tanθ = 815, then 1-sinθ1+sinθ is

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?

The length of the diagonal and the breadth of a rectangle is 13 cm and 5 cm respectively. Calculate its area (in cm²).