1. A big box contains 3 times as many oranges as a small box. If 2 big boxes and 4 small boxes contain a total of 150 oranges, how many more oranges can a big box hold than a small box?
2. A small packet contains half as many apples as a big packet. If 3 big packets and 1 small packet contain a total of 140 apples, how many apples can a big packet hold?