Quantitative Aptitude - Arithmetic Ability Questions

If a+b+c=15 and 1a+1b+1c=71abc, then the a3+b3+c3-3abc is

If in ΔABC, DE ||BC, AB = 7.5cm, BD = 6cm and DE = 2cm, then the length of BC in cm is

PT is a tangent to a circle with centre O and radius 6 cm . If PT is 8 cm then length of OP is

A mixture contains acid and water in the ratio of 7 : 3. If 4 litres of water is added to it, then the ratio of acid and water becomes 7 : 4. What is the quantity (in litres) of acid in the mixture?

In the following question, select the odd letter/letters from the given alternatives.

The value of (1 - √2) + (√2 - √3) + (√3 - √4) + ..... + (√15 - √16) is

If sinθ + cosθ = 1, then the sinθ cosθ is equal to

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term