What is the value of ?

A sum of money doubles itself in 4 years compound interest. It will amount to 8 times itself at the same rate of interest is -

What is the quotient , when 2645 is divided by 48 ? 

The single discount which is equivalent to three successive discounts of 25%, 20% and 10% is-

(sec A + tan A – 1) (sec A – tan A+1) =?

Direction: The following table represents the number of items sold by four divisions of a consumer goods dealer during 2010 to 2013.

The combined sales figures in 2011 and 2013 of which division was the lowest?

A man gives 20% of his money to his eldest son, 30% of remaining he gives to his younger son. 10% of the remaining he gives in a school for poor boys still he has Rs.100.80. Find his total sum. 

50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is , then the rise in the water level in the tank will be: