Quantitative Aptitude - Arithmetic Ability Questions

If a + a2 + a3 – 1 = 0, then what is the value ofa3 + (1/a)?

The average marks obtained by a group of 16 students was 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.5. What was the average marks obtained by the student who left and the one who joined?

If the numbers  93, 204, 256 are arranged in ascending order, then the right arrangement is 

What is the value of tan 6° tan 36° tan 84° tan 54° tan 45°?

If √[(1 + cosA)/2] = x, then find the value of x.

If 31% of an electricity bill is deducted, Rs 1794 is still to be paid. How much was the original bill amount?

A bank offers 20% compound interest calculated on half year basis. A customer deposits Rs 9200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is

A boat goes 8 km upstream and 12 km downstream in 7hours. It goes 9 km upstream and 18 km downstream in 9 hours. What is the speed (in km/h) of the boat in still water?