The value of P + Q in the following table is-

A person deposited ₹500 for 4 years and ₹ 600 for 3 years at the same rate of simple interest in a bank. Altogether he received ₹ 190 as interest. The rate of simple interest per annum was 

Four bells ring at the intervals of 5, 6, 8, and 9 seconds. All the bells ring simultaneously at the same time. They will again ring simultaneously after: 

Directions: Each of the questions consists of a question followed by three statements. You have to study the questions and the statements and decide which of the statements(s) is/are necessary to answer the question. 

What was the percentage of discount offered?
 I. Profit earned by selling the article for Rs. 252 after giving discount was Rs. 52.
 II. Had there been no discount the profit earned would have been Rs. 80
 III. Had there been no discount the profit earned would have been 40%.

If a, b and c are in GP and a^1/x=b^1/y=c^1/z. The value of 2y is?

Directions : The graph shows the demand and production of different companies. Study the graph and answer the following questions.

The demand of company B is what percentage of the production of company F ?

Comprehension: Read the following chart and answer the following questions.

What is the average death rate per day for the week? 

While solving a problem, by mistake, Anita squared a number and then subtracted 25 from it rather than first subtracting 25 from the number and then squaring it. But she got the right answer. What was the given number?