Category: Mathematics

Solution: Mary is twice as old as Ana was when Mary was as old as Ana is now. How old is Ana?

Solution: If 396 were subtracted from the number, the order of the digits will be reversed. Find the number

Solution: How many of each type did he buy?

Solution: How much tin and how much lead can be added to 700 kg of an alloy

Solution: How long will the pipe be able to fill up the tank?

Solution: Suppose A = {2,4,6,8,10,12}, B = {1,4,9,16} and C = {2,10}

Solution: How long will Tito have to work with Ding?

Solution: How long can each worker do the work alone?

Solution: In two years, the boy will be ¾ as old as she. How old are they?

Solution: How old is the son?