A Grab Bag Of Teasers...
1. A 30 year old man married a 25 year old woman. She died at age 50 and her husband was so devastated that he cried for years. Ten years after he stopped crying, he died. If he had lived to be 80, how many years was he a widower?
2. Write down a mathematical expression, having a value of 24, which uses three equal digits, none of them being 8.
3. Three boys have twenty walnuts between them. Billy has three more walnuts than Alan, but five fewer than Charlie. How many walnuts do they each have?
4. You have 10 trees you need to make 5 rows of 4. How do you do it?