The greatest number which when divided by 989 and 1327 leaves remainder 5 and 7 respectively is

A sum of Rs.1600 gives a simple interest of Rs.252 in 2 years and 3 months. The rate of interest per annum is 

The sum of two numbers is 45 and their ratio is 7: 8. The two numbers are:

The average of 8 readings is 24.3, out of which the average of the first two is 18.5 and that of next three is 21.2. If the sixth reading is 3 less than seventh and 8 less than eight, what is the sixth reading? 

Simplify : $$ {(2x)^{2}-(2y)^{2}-(4x)^{2}}$$

If tan $$ -{7π\over4}=x $$ then the value of x is : 

A can complete a piece of work in 10 days, B in 15 days and C in 20 days, A and C worked together for two days and then A was replaced by B. In how many days, altogether, work was completed?

The top of two poles of height 24 m and 42 m are connected by a wire. If the wire makes an angle of 60° with the horizontal, then the length of the wire is