Quantitative Aptitude - Arithmetic Ability Questions

There was a group of 6 students who took a test. Another student joined the group after taking the test later. With her marks included the average score of the group went up by 3. This student has got ___ marks more than the average marks without her being included.

The angles of elevation of the top of a tower 72 metre high from the top and bottom of a building are 30° and 60° respectively. What is the height (in metres) of building?

After buying a toy for Rs.45, Raghu managed to sell it at a profit of 15%. The selling price of the toy was

Manish lent out Rs 20000 in two parts. He put out first part at 6% and the second part at 8% interest. The yearly average interest comes out to be 6.4%.What are the amounts (in Rs) that were lent at 6% and 8% respectively?

If 60/75 is equivalent to 4/x, then the value of x is

Which of the following pairs is NOT a pair of twin primes?

What is the value of 12 + 3(-2 x 3) - (18 / 6) ?

 In a fraction when 3 is added to its numerator and denominator it becomes 4/5. And it becomes 1/2 when 2 is subtracted from both the numerator and denominator. Find the fraction.