When n is divided by 6, the remainder is 4. When 2n is divided by 6, the remainder is : 

380 mangoes are distributed among some boys and girls who are 85 in numbers. Each boys gets four mangoes and each girls gets five. The number of boys is : 

By selling a pen for Rs 105 there is a loss of 30%. At what price (in Rs) the pen must be sold in order to gain 30%?

Salary of a person is first increased by 20 %, then it is decreased by 20 %. Then the percentage change in his salary is: 

Raju, Shobha and Mohan can do a work in 15 days, 20 days and 25 days respectively. In how many days, will the work be finished, if they do it on alternate days?

Directions : Given line graph shows the data of male & female population in 5 different cities. Read the data carefully and answer the questions.

In city B & C, ratio of postgraduates is 7 : 8. Total population who is postgraduate in city B is equal to total population of city A. find ratio of non-postgraduate population in city B to that of city C.

By a selling basket for Rs. 19.50, a shopkeeper gains 30 %. For how much should he sell it to gain 40 %? 

Pratip started the business by investing some money. After some time, Sheela shared double by investing double the money. At the end of the year, the profit was distributed in such a way that 7 times the profit of Pratip was equal to 6 times the profit of Sheela, then after how many months did Sheela join the business.