If the first three common multiples of two numbers are 14, 28 and 42, what are their next three common multiples?
50, 70 and 80
56, 70 and 84
84, 98 and 112
82, 88 and 96
What is the HCF of 27 and 36?
36
3
9
18
What is the HCF of 81 and 72?
72
81
63
What is the greatest number that divides 345, 720 and 180 completely?
5
15
180
What is the LCM of 100, 150 and 200?
300
450
600
480
What is the LCM of 12 and 18?
54
48
27
What is the LCM of 12, 18, 24 and 36?
2
108
84
The HCF of 26 and 455 is 13. What is their LCM?
910
830
912
820
The HCF and LCM of two numbers are 1 and 342 respectively. If the smaller number is 18, what is the bigger number?
34
19
21
32
Which are the prime numbers between 20 and 40?
21, 27, 33, 39
27, 29, 33, 37
23, 29, 31, 37
23, 25, 31, 33
Type the first six multiples of 2.
Type the first five multiples of 5.
Type the first ten multiples of 10.
Type the first five multiples of 12.
Type all odd numbers less than 10.
Type all prime numbers between 50 and 70.
Type the common factors of 10 and 15.
Type all the numbers less than 90, which are the common multiples of 5 and 6.
The HCF of 13 and 169 is 13, type their LCM.
The HCF and LCM of two numbers are 5 and 385 respectively. If one of the two numbers is 55, type the other number.
