1. What do the following words have in common?

TEND

PRESS

TRACT

PLAIN

CHANGE

2. What do the following words have in common?

BUZZ

PART

MAZE

MUSE

STERN

MORAL

HINTS:

1. The same two letters, added in the same place, will produce new words.

2. A single letter will change each words into a new one.

Answers:

1. Each word can be preceded by EX to make new words.

2. Each word can be preceded by A to give new words.