Number Play

Why are divisibility rules useful in mathematics?

1. They make numbers larger.
2. They help identify whether a number can be divided exactly without performing long division.
3. They change prime numbers into composite numbers.
4. They reduce the value of numbers.

Which of the following is an odd number?

1. 62
2. 74
3. 89
4. 96

Which number is an even number?

1. 31
2. 47
3. 58
4. 73

Which number is divisible by 10?

1. 53
2. 60
3. 47
4. 81

What is the greatest common factor of 12 and 18?

1. 2
2. 3
3. 6
4. 9

Which of the following numbers is not divisible by 2?

1. 48
2. 56
3. 71
4. 90

How many factors does a prime number have?

1. One
2. Two
3. Three
4. Four

Which of the following is a multiple of 9?

1. 63
2. 65
3. 67
4. 69

The factors of 18 are:

1. 1, 2, 3, 6, 9
2. 1, 2, 3, 6, 9, 18
3. 2, 3, 6, 18
4. 1, 3, 9

Which of the following numbers is divisible by 3?

1. 26
2. 45
3. 28
4. 34

What is the smallest prime number?

1. 0
2. 1
3. 2
4. 3

Which number is divisible by both 2 and 5?

1. 18
2. 25
3. 40
4. 33

Which of the following is a composite number?

1. 13
2. 19
3. 29
4. 24

Which of the following is a prime number?

1. 15
2. 21
3. 17
4. 27