If the difference between CI and SI for 3 years at the rate of 10% is Rs 31. Find the principle.

Arrange 2/3; 4/5; 1/2; 3/4 in descending order :

One angle of a triangle is 55°. If the other two angles are in the ratio 9:16, find the angles?

If A : B: C= 2 : 3 : 4, then $$ {A\over B}:{B\over C}:{C\over A}$$ is equal to 

Two men start walking together to a certain destination, one at 6 km/hr and other at 7.5 km/hr. The later arrives an hour before the former. The distance is ?

A boy scored 125 marks and 140 marks in the first test and the second test respectively. If the maximum mark in each test is 150, then the percentage increase in his performance is ___________.

With the increase in the price of sugar by 45%, a consumer can buy 9 kg less sugar for Rs. 1740. What is the increased price per kg of sugar?

If (a+b)=16 and a³+b³=1456, then what is the value of ab?