Question

need help plz

Using a balance scale and three weights, you can weigh any whole number of pounds from 1 to 13 lb. What are the weights?
a.
1 lb 4 lb 5 lb
c.
1 lb 5 lb 10 lb
b.
1 lb 3 lb 9 lb
d.
2 lb 6 lb 8 lb

Answer 1

Hint:

Continue until 13.