The easiest way is to divide successive 8's by 6 until you get an integer:
8 ÷ 6 = 1.3333
88 ÷ 6 = 14.666
888 ÷ 6 = 148
?
Puzzle 3
Hidden in the grid below are three boys names. Starting at any point, trace out the path of a chess knight. The last letter of one name starts the next one. What are the names?
Reasoning
This is the only word that cannot be spelled using a calculator.
For example, if you enter 376616 into an old-fashioned calculator, and look at the number upside down, you can read GIGGLE.
376616 = giggle
7105 = soil
57738 = bells
378806 = gobble
4506 = gosh
5508 = boss
3704 = hole
5355378 = blesses
coil = ????