Answer:
1-
With 5 kg
and 9 kg weights in different pans, weigh 4 kg.
2- With 4 kg weigh a second 4 kg
3- Now weigh a third 4 kg
4- Weigh a fourth 4 kg
5- Weigh a fifth 4 kg
6- You now have 5 x 4 kg = 20 kg
7- Divide equally each portion of 4 kg on the two sides of
the scale to obtain 2 kg weights.
8- Bag 'em...Dano!
