D, E, F are the mid - points of the sides BC, CA and AB respectively of a ΔABC. Then the ratio of the areas of DEF and ΔABC is D, E, F.

If the side of the square is increased by 30%, then how much % does its area get increased?

The ratio of the number of boys and girls in a college is 6 : 7. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

There are 80 students in a class out of these 15% are girls. The monthly fee of each girl is Rs.350 and monthly fee of each boy is 38% more than each girl. What is the total fee of girls and boys in the class?

The ratio of incomes of A and B is 3:5, whereas the ratio of their expenditures is 4:7 respectively. If A and B save Rs. 16,000 and Rs. 26,000 respectively, then what is the different between their expenditures?

The greatest number that can be subtracted from 10000 so that the remainder may be divisible by 32, 36, 48 and 54 is:

ABCD is parallelogram. P and Q are the mid points of sides BC and CD respectively. If the area of ∆ABC is 12 cm² then the area of ∆APQ is 

If  $$ {x^{\sqrt{x}}}={({x{\sqrt{x}}})^{x}}$$, then the find the value of x