Quantitative Aptitude - Arithmetic Ability Questions

7 litres mixture of milk and water contains 30% water. 3.5 litres of milk is added to this mixture. What is the percentage of water in the new mixture?

A money lender lends Rs. 400 for 3 years to a person and lends Rs. 500 for 4 years to the other person at the same rate of simple interest. If altogether he receives Rs. 160 as interest, what is the rate of interest per annum ?

A non-zero number is greater than 7 times its reciprocal by 9.3. What is the number?

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

A can do a work in 24 days and B in 40 days. If they work on it together for 10 days, then what fraction of work is left?

If 5 ­ 3x < 4 ­ x and 5(2 ­ x) > 2 ­ 2x, then x can take which of the following values?

If 4(x + 5) -­ 3 > 6 -­ 4x ≥ x -­ 5; then the value of x is

What is the value of (1 + cotA)2 + (1 -­ cotA)2?