In Mr. Jeff's family, there are one grandfather, one grandmother, two fathers, two mothers, one father-in-law, one mother-in-law, four children, three grandchildren, one brother,two sisters, two sons,...
A number of 9 digits has the following properties: The number comprising the leftmost two digits is divisible by 2, that comprising the leftmost three digits is divisible by 3, the leftmost four by 4,...
There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to the first person leading the platoon. So while the platoon is marching he runs ahead,reaches...
Five kids were sharing out a box of candies. Alex took one-third, Bobby took one-quarter, Cass took one-fifth, and Danny took one-sixth. That left six candies as Emily's share. How many candies were...
Three fish have a total weight of 15 pounds. The lightest is one quarter the weight of the other two together, and the heaviest is one pound less than the weight of the other two together. How much...