Quantitative Aptitude - Arithmetic Ability Questions

What is 15% of 34 ?

If tan(A/2) = x, then the value of x is

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE

The age of Rakhi is twelve times that of her daughter Anubha. If age of Anubha is 3 years now, then what was the age of Rakhi, 2 years earlier?

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is

Abhishek marks the price of his laptop 60% above the cost price. If he gives a discount of 30% on the marked price, then what is the profit percentage?

In a container, two types of liquids P and Q are in the ratio of 3 : 7. If 10 litres mixture is drawn off from the container and filled with 6 litres of liquid Q,then the ratio of P and Q becomes 1 : 3. What was the original quantity (in litres) of mixture?

If x = 4aba+b, then what is the value of x+2ax-2a+x+2bx-2b ?