The square root of a positive number less than 100 lies between

If a cuboid of dimensions 64cm×16cm×8cm is melted and recast into two equal cubes of same size. Then what will be the ratio of the surface are of cuboid to the total surface area of the two cubes?

A person who spends $$ 16{2\over3}\% $$ of  his income is able to save 1200 per month. His monthly expenses (in) is:  

There are some friends, all less than 20 years. When paired amongst themselves they realize that the sum of their ages is a multiple of 5. If their ages are distinct prime numbers, then the number of possible pairs are: 

A sum become Rs. 10,650 in 5 years and Rs.11076 in 6 years at simple interest. What is the sum?

Directions: The bar graph, given here, shows the number of tickets sold by 6 students A, B, C, D, E and F during a fair. 

Total number of tickets sold by D, E and F is 

If the score of five students is 8,7,9,16,25, then their mean deviation will be.

Direction : What value should come in the place of question mark (?) in the following questions?

$$({144\over16}×{828\over 9})=?+325 $$