general Maths Puzzle

An item is marked at Rs. 970 cash or for Rs. 210 cash down payment followed by three equal monthly instalments. If the rate of interest charged under the instalment plan is 16% p.a; then what is the monthly instalment?

Read Solution (Total 0)

general Other Question

Student of a class are made to stand in rows. If 4 students are extra in a row, there would be 2 rows less. If 4 students are less in a row, there would be 4 more rows. There would be 4 more rows. What is the total number of students in the class? The screen display of an electronic lock can be unlocked by touching 7 points in certain sequence without overlap , out of total 9 points, arranged in the rows of 3. In how many ways this unlocking is possible ?