The question says isaiah has 10gm weight and a two-pan balance.
If isaiah puts the 10gm weight on left or right pan of the scale balance, we need to find out how many 1gm weights are needed to be put in the other pan to balance the scale.
Since 1gm × 10 = 10 gm
So, 10 1gm weigths will be required to balance the scale.
