摘要： Arranged probabilityIf a box contains twenty-one coloured discs, composed of fifteen blue discs and six red discs, and two discs were taken at random,... 阅读全文

摘要： Largest exponential Comparing two numbers written in index form like 211 and 37 is not difficult, as any calculator would confirm that 211 = 2048 < 37 阅读全文

摘要： Anagramic squaresBy replacing each of the letters in the word CARE with 1, 2, 9, and 6 respectively, we form a square number: 1296 = 362. What is rema... 阅读全文