Quantitative Aptitude - Arithmetic Ability Questions

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

The distance between the points (4, 8) and (k,-4) is 13. What is the value of k?

Karteek is twice as good a foreman as Raju and together they finish a piece of work in 20 days. In how many days will Raju alone finish the work?

Find out the odd word/letters/number/number pair from the given alternatives.

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

Δ ABC is right angled at B. If m∠A = 60°, then what is the value of sec C.sin A?

The value of the expression 2(sin6θ+cos6θ) - 3(sin4θ+cos4θ) + 1 is

In the given figure, AQ = 4√2 cm, QC = 6√2 cm and AB = 20 cm. If PQ is parallel to BC, then what is the value of PB (in cm) ?