偶数、基数、倍数、因数、质数你我知

Which number is not a prime number?

请问以下哪个数不属于质数？

• 1

• 2

• 17

• 19

Find the prime number whose is the even number?

以下哪个数是属于质数也是偶数？

• 2

• 3

• 9

• 11

In natural number, the smallest composite number is _____.

在自然数中最小的合数是________.

• 2

• 4

• 6

• 8

Please write down the factors of 18.

请列出18的因数。

(a)  

Is 104 a multiple of 8?

判断104是不是8的倍数？

• Yes

• No

24 may have one or more factors. The smallest factor is _______, the largest factor is _______.

24的因数可能有好几个，其中最小的因素是_____, 最大的因数是____。

• 1 ; 24

• 2 ; 24

• 4 ; 6

• 6 ; 7

Which number is the smallest of multiples of 11?

11的倍数有无限多个，其中最小的倍数是_________.

• 1

• 11

• 22

• 33