1. There are 10 bags of coins. In each bag, there are 10 coins each weighing 1g. However, there is one bag of coins with each coin weighing 1.1g. Given a digital weighing scale, how can one deduce which is the bag that contains the 1.1g coins if you are given just one chance to weigh?
2. There are 3 lightbulbs on level 2 of a building. There are 3 switches on level 1 of the same building. How is one able to deduce which is the correct switch for the lightbulbs if you are given only a chance to go up to level 2 once?
3. There is a bridge that is able to take exactly one tonne of load. A lorry weighing exactly one tonne is on its way to the bridge when a "pile" of birdshit falls on the lorry just before it crosses the bridge. Why is the lorry able to cross the bridge without the bridge collapsing?
4. Stupid question one
If this hand is a bean, what does the action represent? Guess a type of bean
5. Stupid question two
If the above hand is power, what does the action represent? Guess a type of power
Ready for the answers???
Here goes.....
1. Label each bag from 1 to 10. Take a coin from bag one and 2 coins from bag 2 and so on and so forth. Put all the coins on the weighing machine. The decimal shows the bag that coins 1.1g coins...Did you get this correct? tough man...
2. On the first switch for 1 min. Off the switch. On the 2nd switch and go to level 2. The bulb lighted connects to the second switch. The unlighted but feels warm bulb connects to the first switch.
3. When the lorry is travelling, it burns up the fuel and by the time it reaches the bridge, it weighs one tonne minus the fuel plus the birdshit. Assuming the fuel burnt is heavier than the birdshit, the lorry is able to safely drive across the bridge.
4. Soya Bean. 手压bean!!!
5. Solar Power 手拉power!!!
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