Any number.

Your mother.

Both 200 pound guys go across, and the 400 pound guy stays then one of the 200 pound guys come back and gets out, and the 400 pound guy goes across he gets out the 200 pound guy go back across and picks up the other guy.

59
The first 56 balls could be of all colours except red. This would leave 8 balls, all of which are red, so any three chosen would be red.

2
mother and father

Red duck.

Nine

A carrot

It’s lid.

The letter D.
The sequence contains the first letter of each month.

It was either Saturday or Sunday.

Day One: You make your first cut at the 1/7th mark and give that to the worker.
Day Two: You cut 2/7ths and pay that to the worker and receive the original 1/7th in change.
Day three: You give the worker the 1/7th you received as change on the previous day.
Day four: You give the worker 4/7ths and he returns his 1/7th cut and his 2/7th cut as change.
Day Five: You give the worker back the 1/7th cut of gold.
Day Six: You give the worker the 2/7th cut and receive the 1/7th cut back in change.
Day Seven: You pay the worker his final 1/7th.