The common factors of 12 and 30 are
2, 3, 6
2, 3, 4
2, 3, 5
2, 4, 6
GCF of 27 and 45 is
8
9
10
5
The prime numbers between 20 and 40 are
23, 29, 31, 37
23, 27, 29, 31, 37
23, 27, 29, 31, 33
23, 29, 31, 35, 37
Without actual division determine which of the following is divisible by 9.
10008
68709
17360
32900
The common factors of 8 and 12 are
2, 4, 8
2, 4
The multiples of 3 less than 20 are.
1, 3, 6, 9, 12, 15, 18
3, 6, 9, 12, 15, 18
1, 3, 9 12, 15, 18
3, 9, 12, 15, 18, 21
The prime factorisation of 1080 is
2 × 2 × 2 × 3× 3× 3×5
2× 2× 2× 2× 2× 3× 3× 5
2× 2× 3× 3× 3× 3× 5
2× 2× 2× 3× 3× 5× 5
Without actual division determine which of the following is divisible by 5.
12345
32873
71324
17362
The prime numbers less than 15 are.
1, 2, 3, 7, 11, 13
1, 2, 3, 5, 7, 11, 13
2, 3, 7, 11, 13
2, 3, 5, 7, 11, 13
Without actual division determine which of the following is divisible by 6.
63855
961572
