Pump A can fill a tank in 10 minutes, while pump B can fill the same tank in 15 minutes. Both pumps are turned on together to fill the empty tank, but when tank became half full, pump B stops working and rest of the tank is filled by pump A only. How long it took to fill the tank?
The cost of a doll is a two digit number (for example $xy). Its selling prices has same digits as cost with digits interchanged ($yx). If its profit margin is divided by 9, find the remainder of division.
There are 43 employees in a company working in three shifts. The first group of 11 employees work from 09:00 AM to 12:00 PM. The second group of 17 employees work from 10:00 AM to 02:00 PM. The third group of 15 employees work from 12:00 PM to 02:00 PM. If there are only 4 computers available, find the time during which the computers are likely to be used the most?
Find the compound interest of $80000 after 2 years, compounded annually. The rate of interest is 7% per annum during the first year and 10% per annum during the second year.
There are 7 orange balls, 5 white balls, and 6 purple balls in a bag. What is the probability of picking up one white ball out of the bag without looking?
Find the conclusion by assuming following statements to be true (Statements may be contrary to the universal opinion). Statements : (i) All chairs are pencils (ii) All boys are chairs. Conclusion?