The lazy garderner

It takes two gardeners 8 days to mow a lawn.

One is lazy and one is energetic.

The energetic one would only take 12 days to mow it on his own.

How many days would the lazy gardener take to mow the lawn on his own?



by lee ting.

Problem at the Bank
A bank customer had £100 in his account. He then made 6 withdrawals, totaling £100. He kept a record of these withdrawals, and the balance remaining in the account, as follows:


Withdrawals Balance left
£50 £50
£25 £25
£10 £15
£8 £7
£5 £2
£2 £0

----------------------

£100 £99

Why are the Totals not exactly right?


by lee ting.

Coke Can Eruption

I can never forget the baffled faces of Maths n Science Club members when they were asked to open their coke can after shaking it vigorously.Everyone held their cans as far as they could from them-scared that the drink will spurt out.But for our great surprise...the drink did not spurt out.So lets see how does it work.

What You Need
-A fizzy drink

What To Do
First,shake the can vigorously.Then tap on top of the can 15-20 times.Now open the can and you notice that the drink did not spurt out.

How Does it Work
Fizzy drinks are fizzy because they have loads of carbon dioxide dissolved in them under pressure.If you have shaken the drink you will have mixed a whole lot of bubbles into the liquid.These bubbles have already started so if you open the drink immediately,the bubbles can expand rapidly creating foam.The foam is much larger than the can so the drink will spurt out.So by tapping the can it will dislodge the bubbles and therefore less amount of foam is produced.

Balloon Kebab

Its called Balloon Kebab.Anyway it was not eadible but it is a very challenging game.What do you think will happen when a sharp pointy thing meets a balloon-'BANG'.But the most challenging part of this game is to insert a skewer through the balloon without popping it.Amazing right???So now lets see how to do it.

What You Need
-Balloons
-Skewer

What To Do
Insert the skewer through the bottom of the moderate sized balloon,where it is tied off,where the rubber is dark and stretchy.Then try to push it through the very top of the balloon where it is the darkest.So that you have a balloon kebab.

How Does It Work
The darker section around the bottom where the rubber is less taut.This part and the area around the tied end can be penetrated with a sharp object without the balloon popping.In fact,the rubber tightens around the sharp object to keep air from escaping.