Quantitative Aptitude - Arithmetic Ability Questions

A sum of money was invested at the rate of 7.5% S.I. per annum for 4 years. If the investment was for 5 years, the interest earned would have been Rs. 375 more. What was the initial sum invested?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

What is the simplified value of sec6 A – tan6 A – 3 sec2 A tan2 A?

If cosec4A -­ cosec2A = x, then value of x is?

A trader sold a cycle at a loss of 10%. If the selling price had been increased by Rs. 200, there would have been a gain of 6%. The cost price of the cycle is

The average marks of 40 students in an examination was 34. It was later found that the marks of one student had been wrongly entered as 62 instead of 26. what is the correct average?

3/5 as a decimal fraction?

If m+n=1, then the value of m3+n3+3mnis equal to