A number which, when increased by 123% becomes 3345. The number is—

A batsman in his 20th innings make a score of 110 and there by increases his average by 4. What is his average after 20 innings? 

After a discount of 20% Asmita bought an item for Rs.9600. Asmita sold it to other person and earned a profit of 18% on the original price. At what price other person bought the item?

What will come in place of the question mark (?) in each of the following series?

15     21    33    51     75    (?) 

A wheel travels a distance of 22 km in 2500 revolutions. What is the diameter of the wheel?

A bank offers 20% compound interest per half year. A customer deposits Rs 7600 each on 1^st January and 1^st July of a year. At the end of the year, the amount he would have gained from interest is –