4 Weight bars to weigh given wieght puzzle
You have to take 4 weight bars (all of integer values).
Using only those 4 bars you can weight all from 1 kg to 40 kg (only integers) in one go,
So, of what weight you will select those 4 bars? And how will you weigh?
1
3
9
27
we can easily understand how 1 to 4 kg is done just using 1 and 3-
To Weigh 1Kg – Use 1kg Bar
To Weight 2Kg – Use 3kg Bar on 1 side and 1Kg bar on the other side
and so on……..
Now keeping 9 on other side and using 1 and 3 making combinations of 1 to 4 by using 1 and 3 on other side .net would be combinations of 5 to 8 as we are using combinations of 1 to 4 to subtract fro 9
example to make 5 use 9 on one side and 1 and 3 on other side.
so using 1,3, 9 we can make up to 13 (9 +3+1) now using 27 as next we can use combinations for 1 to 13 for subtraction from 27 giving us 14 to 27.so we can make from 1 to 40 as 1 +3+9+27) we can use combinations of 1 to 13 after putting 27 to make 28 to 40
Your Answer
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