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数学就在我们身边．自然界万事万物纷 繁复杂,变化万端,绚丽多姿,而它们运动发 展变化无不蕴含数的变化规律,映射了数的世 界丰富多彩:正数与负数,奇数与偶数,素数 与合数,虚数与实数,整数与分数……而表示 事物序数和个数的自然数相应也有其独特的 魅力特征,色彩斑斓．下面介绍几种有趣的数． 一、完全平方数 题1有这样的两位数,交换该数数码所 得到的两位数与原数的和是一个完全平方数, 例如,29就是这样的两位数,因为29+92= 121=112,请你找出所有这样的两位数．
Mathematics is on our side. All things in the natural world are complex, varied, and varied, and their movements and developments change with the laws of numbers, mapping the world of numbers to be rich and varied: positive and negative numbers, odd and even numbers, prime numbers and composite numbers, imaginary numbers and real numbers. , Integers and Fractions... The natural numbers that represent the ordinal number and the number of things also have their own unique charisma characteristics. Here are some interesting numbers. First, the complete square number question 1 has such two digits. The sum of the two digits and the original number obtained by exchanging the digits is a complete square number. For example, 29 is such a two digit number because 29+92= 121=112, please find out all such double digits.