**2000 **

Solutions to older problems:

** **

**The
Gold Bars**

Name: RG, State/Country: Australia

1. Divide the eight into two groups of fours and place each group on
one side of

the scale to determine which group is lighter.

2. Then, divide the four from the lighter group into twos and place
them on the

scale again and determine the group which is lighter.

3. Then, place the two bars from this group (the lighter one) on each
side of

the scale and the light bar is found!!

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Name: Pkumar, State/Country: India ,
Age: 24

split the 8 gold bars into 3,3 & 2.

Step1: weigh the 3,3 - there are two possibilities

Step2 (Possibility 1): in step1 if both weigh the same - place
one bar of the 2 bars in the left pan and put the the second bar in
your pocket,

on the right pan place one from either of the 3,3 - if they weigh same
then the bar you are holding is the odd one else the bar on the pan
which goes up is the odd one.

Step2 (possibility 2): if the weigh in step1 shows different - step3:
from the lighter pan take 1 bar and hold it in your pocket, place the
rest (2 bars)

one on each of the pan & weigh if they show difference, the bar
... on the lighter pan is the light one, if not, it is the one in the
pocket

**Can
you help weigh the elephant?**

Achu
from T.N./India, age:12

I think that ... there is a boat.I presume that is big enough for the
elephant.

Mark the level of water, then make the elephant get into the boat.

Mark the new water level Now let the elephant out of the boat

Put weights into the boat till the watermark (with elephant) is reached

count the weights. That is the weight of the elephant