Quantitative Aptitude - Arithmetic Ability Questions

Find the curved surface area (in cm2) of a hemisphere of diameter 7 cm.

Product of digits of a 2-digit number is 24. If we add 45 to the number, the new number obtained is a number formed by interchange of the digits. What is the number?

The sum of a fraction and 3 times its reciprocal is 31/6. What is the fraction?

What is the value of a2 + b2a3 - b3, when a + b = 8 and a - b = 2?

Possible length of the three sides of a triangle are :­

What is the time taken by a 180 m long train running at 54 kmph to cross a man standing on a platform?

If a rod of length 208 45 is cut into equal pieces of length 23 15 then the total number of rods obtained is

In the following question, select the odd letter/letters from the given alternatives.