1. What do the following words have in common?

DO

DON

ACT

TAIL

TRACT

2. What do the following words have in common?

SING

SUIT

CAST

3. What do the following words have in common?

PINT

MUSE

CAST

SHUT

FUND

Answers:

1. Each word can be changed into a new one by adding the letters OR.

2. Each word can be changed into a new one by adding the letter E.

3. Each word can be changed into a new one by inserting the letter O .

POINT, MOUSE, COAST, SHOUT, FOUND

(Credit: NY Times Crossword - June 11, 2000

"OH, NO!" by Nelson Hardy)