流水依依

摘要： Problem HHigh bridge, low bridgeQ: There are one high bridge and one low bridge across the river. The river has flooded twice, why the high bridge is flooded twice but the low bridge is flooded only once?A: Because the lower bridge is so low that it's still under water after the first flood is o 阅读全文

摘要： Problem IInteresting CalculatorThere is an interesting calculator. It has 3 rows of button.Row 1: button 0, 1, 2, 3, ..., 9. Pressing each button appends that digit to the end of the display.Row 2: button +0, +1, +2, +3, ..., +9. Pressing each button adds that digit to the display.Row 3: button *0, 阅读全文

摘要： Problem JJoking with Fermat's Last TheoremFermat's Last Theorem: no three positive integers a, b, and c can satisfy the equation an + bn = cn for any integer value of n greater than two.From the theorem, we know that a3 + b3 = c3 has no positive integer solution.However, we can make a joke: 阅读全文