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

A can do a work alone in 30 days. He left after doing half the work. If B alone can complete the entire work in 16 days, then how many days will B take to complete the remaining work?

A can built a wall in 8 days while B can destroy the same wall in 3 days. A start the work and worked for 6 days, during the last 2 days of which B also joins him. In how many days A can finish the remaining work alone?

A man is twice as fast as women and woman is twice fast as a boy. If all of them i.e., a man, a woman and a boy can finish a work together in 4 days, in how many days will a boy do it alone?

Study the graph carefully and answer the following questions.

What is the average production of State C for three years?

The value of x in the given equation
$$ {23 ^2 + \sqrt{x}=625}$$

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 ___________.

Three men step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. The minimum distance each should cover so that all can cover the distance in complete steps is