ΔPQR is right angled at Q. If cos P = 3/5, then what is the value of cos R?

Raju ate $$3\over 8$$part of a pizza and Adam ate $$3\over 10$$ part of the remaining pizza. Then Renu ate $$4\over 7$$ part of the pizza that was left. What fraction of the pizza is still left?

In a circle, PQ is diameter, RS is chord of length equal to radius of circle. PR and QS when produced intersect at point T. Find the ∠PTQ?

The line graph shows the number of vacancies of accountants in a certain company. Study the diagram and answer the following questions.

Between which two years is the rate of decrement in vacancies is maximum?

Direction: what should come in place at question mark(?).

$$ {4\over 7}×{2{4\over 5}÷{2\over 5}=?}$$

Umesh earns a simple interest of ₹1,600 on a certain sum in two years at the rate of 4% per annum. How much more interest would he have earned if he had invested the same sum at 4% interest per annum, compounded annually?

Direction: Study the following information and answer the related questions. P, Q, R, S, T, A, B, C, D and E are employees of a company. A table shows the average age of any two employees of the company. The average age of A and B is 27.5.
i.e. average age of A & P is given as (A+P)/2=39.5

What is the ratio of ages of Q and E?

A shopkeeper sold sarees at Rs. 266 each after giving 5 % discount on labelled price. Had he not given the discount, he would have earned a profit of 12 % on the cost price. What was the cost price of each saree?