Ben and each of his 9 friends deposited ₹37 every month in a bank for 12 years. How much did they save?

Q. For a year, three friends earned $\$300$ a month together. At the end of the year they divided the money evenly. How much money did each friend earn for the year?

Q. Javed deposited 12000 rupees at 9 p.c.p.a. in a bank for some years, and withdrew his interest every year. At the end of the period, he had received altogether 17,400 rupees. For how many years had he deposited his money ?

Q. Bob and his sister took a loan of Rs 21,000 to buy a log boat. They paid back a total of Rs 23,520 in one year. How much interest did they pay back every month?​

Q. Victor puts a certain amount of money in his piggy bank each month. In the first month, he saves 4 dollars, in the second month he saves 8 dollars, and 12 dollars in the third month. If he saves in the same order for 6 months, how much money will he save at the end?