Quantitative Aptitude - Arithmetic Ability Questions

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If lengths of PS, SQ and PR are 6 cm, 9 cm and 12.5 cm respectively, what is the length of TR?

The ten's digit of a 2­digit number is greater than the units digit by 4. If we subtract 36 from the number, the new number obtained is a number formed by interchange of the digits. Find the number.

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

The average marks of 45 students is shown as 65. It includes a wrong entry of 84 marks instead of 48 marks. The correct average is:

Which one is the largest among the fractions (5/113), (7/120), (13/145) and (17/160)?

If the number 583_437 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

Δ DEF is right angled at E. If m∠D = 45°, then what is the value of cosecF X cotD?

If a + b + c = 0 , then the value of a3 + b3+ c3 is