2. A man decides to have a day out and get fit at the same time by setting off from home on a bike. He rides toward his intended destination at 9 km per hour. However, during the ride he sustains a puncture which he quickly realises he cannot repair, so he wheels the bike home at 3 km per hour.
Given that he was away from home for eight hours, how far in km did he get before he had to return?
A bar is divided into four equal intervals and set to balance at the middle. Weights of 15 g, 12 g and 24 g are placed on the bar in the positions shown. What weight will be required at position Z to balance the bar?
The picture shows a frictionless pulley, a weightless rope, a monkey at one end of the rope and a weight at the other end that has exactly the same mass as the monkey. What (if anything) will happen to the weight if the monkey climbs up the rope?
6. A tramp can use the tobacco from five cigarette butts to roll one new cigarette. How many cigarettes can he make from twenty-five cigarette butts?
7. Somebody at a party introduces you to your mother’s only sister’s husband’s sister–in-law. He has no brothers. What is this lady to you?
9. A toy boat is floating in a swimming pool.
Which will raise the level of the water in the pool higher?
a. dropping a 50 cent coin in the boat
b. dropping a 50 cent coin in the pool
c. both will raise the water level the same amount