... pie, it is known that the smaller piece is less than five percent. In the sec-ond pie, it is known that the smaller piece is greater than eight percent. Solution on page 86. 30 Your challenge ... flexing of your mental muscles. Three-pencil puz-zlers are the toughest nuts to crack, demanding rigorous cere-bral calisthenics to decipher or divine these gruelers. So sharpen your pencils, ... to nine. It is your challenge to switch these letters back to numbers in such a way that each horizontal, vertical, and diagonal row of three words totals the same number. Your total for this...