A and B can do a work in 12 days. B and C together can do it in 15 days and C and A together in 20 days. If A, B, C work together, they will complete the work in :
75% of a number is added to 75, then the result is the number itself. What is the number ?
The number of marble slabs of size 20 cm x 20 cm required to pave the floor of a square room of side 3 metres is :
A student multiplied a number by 3/5 instead of 5/3. What is the percentage error ?
If a/3 = b/4 = c/7, then ( a + b + c )/c = :
A vendor bought 3 chocolates for 1 rupee. For how much per chocolate should be sell, to gain a profit of 50%