Seven Solution; Person one buys half the eggs [3 1/2] plus 1/2 an egg, or 4 total. No eggs broken. This leaves 3 eggs. Person 2 buys half the remaining eggs [1 1/2] plus 1/2 an egg, or 2 total. Again no eggs broken. This leaves 1 egg. Person 3 comes along, and he buys half the eggs [1/2] plus 1/2 an egg, or 1 egg. No broken eggs, eggs all sold

There were only three beneficiaries – son, father and grandfather.

$3,000.

ONE WORD

Keyboard

Silence

The whole alphabet

On an analog clock (11am + 2hrs= 1pm).

A vacuum cleaner