Quantitative Aptitude - Arithmetic Ability Questions

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

The value of a machine depreciates at the rate of 20% per annum. If its present value is Rs 96000, then what was the value (in Rs) of the machine 2 years ago?

The angle of elevation of the top of a hill at the foot of the tower is 60 deg and the angle of elevation of the top of the tower from the foot of the hill is 30 deg. If the tower is 50 m high, what is the height of the hill?

Three balls ring at intervals of 15, 30 and 45minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM?

The sum of the cubes of two numbers in the ratio 3 : 4 is 5824. The sum of the numbers is:

The product of two numbers is 0.432. One of the numbers is 1.6. What is the other number?

The radius of a hemisphere is 21 cm, what is its volume? (Take π = 22/7)

What is the simplified value of (cosec A + sin A)(cosec A – sin A)?