不超过 1000的正整数中,能被 25 整除的数有哪些?不超过 10000的正整数中,能被 125 整除的数有哪些?
Among the positive integers less than or equal to 100,0, which ones are divisible by 25? Among the positive integers less than or equal to 1,000,0, which ones are divisible by 125?
(IG)
Write down all the prime numbers from 1 to 30 .
请写出1到30之间的所有质数
Here is a set of numbers:{−4,−1,
,−0.75,1,5.5,8,9,17,19}
List the numbers from the set that are:
(a)Natural numbers
(b)Odd numbers
(c)Square numbers
(d)Cube numbers
(e)Negative integers
(f)Decimal fractions
(g)Fractions
(h)Prime numbers
(i)Composite numbers.
给定一组数: {−4,−1,
,−0.75,1,5.5,8,9,17,19}
请列出该集合中属于以下类别的数:
(a) 自然数
(b) 奇数
(c) 平方数
(d) 立方数
(e) 负整数
(f) 小数
(g)分数
(h) 质数
(i) 合数