Quantitative Aptitude - Arithmetic Ability Questions

Dodecahedron has 20 vertices. How many edges does it have?

The simple and compound interest that can be earned in two years at the same rate is Rs 1500 and Rs 1575 respectively. What is the rate (% per annum) of interest?

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

Among three numbers , second is twice the first and also thrice the third . If the average of the three numbers is 33 , then the largest number is

Two valves P and B can fill a sump in 37.5 minutes and 45 minutes respectively. Both valves are opened. The sump will be filled in just 30 minutes, if valve B is turned off after

What is the difference (in Rs) between compound interest (compounded annually) and simple interest for 3 years on a principal of Rs 3000 at the annual rate of 20%?

√[(1 ­ sinA)/(1 + sinA)] is equal to?

The HCF of 24, 60 and 90 is: