Quantitative Aptitude - Arithmetic Ability Questions

Calculate the value of ∡OBC + ∡BAC, if O is the circum-center of the triangle ABC inscribed in the circle.

Present age of Ashok is twice the present age of Kishan. After 7 years the Kishan’s age will be 4 times of the Kartik’s present age. If Kartik celebrated his 9thbirthday 3 years ago, then what will be the present age (in years) of Ashok?

What will be the maturity value, if Rs. 13,500 is deposited at a simple rate of interest of 12.5% for two years?

Given w = -2, x = 3, y = 0 & z = -1/2. Find the value of (z/w) + x.

The angle of elevation of an aeroplane from a point on the ground is 45°. After flying for 15 seconds, the elevation changes to 30°. If the aeroplane is flying at a height of 2500 metres, then the speed of the aeroplane in km/hr. is

What is the square root of 6561?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.