Quantitative Aptitude - Arithmetic Ability Questions

Findout the odd word/letters/number/number pair from the given alternatives.

13 years ago Ram was twice as old as Sunny. Three years from now Sunny's age will be 3/5 of Ram's age. What is Ram's current age?

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

Convert decimal number 101 to binary.

For what value of 'y', x2 + 112x + y2 is a perfect square?

The sum of squares of three positive integers is 323. If the sum of squares of two numbers is twice the third, their product is

Three solid spheres of radius 3 cm, 4 cm and 5 cm are melted and recasted into a solid sphere. What will be the percentage decrease in the surface area?

PQ is a diameter of a circle with centre O. RS is a chord parallel to PQ subtends an angle of 40° at the centre of the circle. If PR and QS are produced to meet at T, then what will be the measure (in degrees) of ∠PTQ?