May 9, 2010

1. Five years ago Vic's age was 1/3-rd of the Ash's. Now Vic's age is 17. What is the age of Ash right now?
2. The sum of the ages of the Dad-Son pair is 45 years right now. Five years ago the product of their ages was 4 times the age of the dad at that time. What is the current age of the Dad and the Son?
   
3. In a chess tournament each of the six players will play all other players exactly once. How many games will be played in all?
4. The KidsPlay store bought 6 teddy's for $10, and sold them as 4 for $10. In all they made $60 profit from the teddy's. How many teddy's did they buy?
5. In a quiz, I have 7 times as many correct answers as the wrong ones. In all there were 10 dozen questions in the exam. How many did I get right?
6. There are two tall cedar trees in the Stonecrest park. The trees are 40m apart, and they are 30 m tall. Suppose there is a rope running from the top of each tree to the bottom of the other tree, how high above the ground the two ropes will intersect.
   
7. Suppose in the previous question, the trees were 20 m and 30 m tall, how high above the ground will the ropes meet?
8. Suppose a leaky tap drips two drops of water every second, each drop is about 2ml. How much water is wasted in one year. Suppose you require 2 bucket full of water every day (approx. 40 l), compare that with the amount wasted water.