The total cost of x pens and (x-2) pencils is Rs 424. If one pencil and one pen costs Rs 4 and Rs 20 respectively then find x?

A mixture contains wine and water in a ratio of 5: 1. On adding 5 litres of water, the ratio of wine to water becomes 5: 2. The quantity of wine in the mixture is?

The average expenditure of a man for the first five months of a year is Rs. 5,000 and for the next seven months is Rs. 2,300 during a year. His average monthly expenditure is : 

What is compound interest on a sum of Rs. 37,500 for $$ {1{1\over 3}}$$ years at a rate of 12 % per year. If the interest is compounded 8 monthly?

If the price of tickets is increased in the ratio 8 : 11 then the number of tickets sold falls in the ratio 23 : 21 then what is the increase in the revenue, if the revenue before the increase in the price of the ticket was Rs 36,800 ?

Manju's salary is 60% more than Sohan's then tell what % Sohan's salary is less than Manju's salary?

Twice the difference between two numbers is equal to their sum. If one number is 15, find the other number.

If 3 added to both the numerator and the denominator, the fraction becomes 10/11 when 4 is subtracted from both the 4 numerator and the denominator of the same fraction, it becomes ¾. What is the value of the fraction?