Five from Seven, Backwards

Puzzle master Will Shortz quizzes one of our listeners, and has a challenge for everyone at home.

Challenge from February 11: By using only the letters in the phrase "Triple Mocha," and repeating them as often as you wish, you can spell the name of another cold treat. The answer consists of four words, with a total of twenty one letters. What is it?

Answer: Chocolate Chip Ice Cream

Winner: Joy Bloomstein from Duanesburg, N.Y.

Challenge for February 18: The object of this challenge is to develop nine different mathematical expressions that equal eight. You must use the digits 2, 7 and one other. And that other digit must be a one in the first expression, two in the next expression and so on, up to nine. You can use a digit once and only once in each expression.

You may use the four arithmetic symbols: plus, minus, times and divided by, as well as exponents and decimal points. You may use parenthesis as you need them. For example: Using the digits 2, 7 and 1 you can make the expressions 2+7-1= 8.

This week's Challenge is from Robert Wainwright in New Rochelle, N.Y.

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