Question 164(iv)
If possible, find a hook-up of prime base number machine that will do the same work as the given stretching machine. Do not use (× 1) machines.
× 1111=101×11 hook-up machine.
Question 164(i)
Question 164(iii)
Question 159(i)
Find a single repeater machine that will do the same work as each hook-up.