Quantitative Aptitude - Arithmetic Ability Questions

The addition of a rational number and its reciprocal is 61/30. Calculate the number.

If 192 pens cost is Rs.10, how many pens can be bought for Rs.5?

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

Determine the value of ‘r’ for which the equation 13x + 5 = rx + 18 has no solution.

Two men are on opposite sides of a tower. They measure the angles of elevation of the top of the tower as 30 ̊ and 45 ̊ respectively. If the height of the tower is 50 m, the distance between the two men is (Take √3 = 1.73)

If 40 is 0.05% of x, then what is the value of x?

The length of one side of a rhombus is 13 cm and one of the diagonals is 10 cm. What is the legth of the other diagonal?

If x2 – 12x + 33 = 0, then what is the value of (x – 4)2 + [1/(x – 4)2]?