Number Sense
Is 48 an odd or even number?
even
List two factors of 12.
1 & 12
2 & 6
3 & 4
Write the first three multiples of 6.
6,12,18
Which is a proper fraction: 7/4 or 3/5?
3/5
What does LCM stand for?
Lowest Common Multiple
Circle the prime number: 21, 29, 35
29
How many factors does 10 have?
four (1, 2, 5, 10)
Is 24 a multiple of 8?
Yes
Simplify: 4/8
1/2
Find the LCM of 4 and 6.
12
What is the place value of the digit 7 in 7,342?
7,000
Which number is a factor of 24: 5, 6, or 9?
6
Which is a multiple of 9: 27 or 28?
27
Which fraction is equivalent to 2/3: 4/6 or 3/6?
4/6
What does HCF stand for?
Highest Common Factor
True or False: All even numbers are composite numbers.
False - 2 is a prime number.
Find the common factors of 12 and 18.
1,2,3,6
List all multiples of 5 between 10 and 40.
15, 20, 25, 30, 35
Find 1/4 of 20.
Find the HCF of 12 and 16.
4
Which number does not belong? Explain why.
15, 21, 23, 27
23 (it is prime; the others are composite)
A number has exactly two factors. What type of number is it?
Prime
If a number has exactly TWO factors — 1 and itself — then it is a PRIME number.
Explain how you know 36 is a multiple of 4.
4x9=36
True or False: 6/6 is equal to 1. Explain.
True
Two bells ring at the same time.
One rings every 6 minutes.
The other rings every 9 minutes.
After how many minutes will they ring together again?
Working:
Multiples of 6: 6, 12, 18, 24…
Multiples of 9: 9, 18, 27…
LCM = 18
Answer:
They will ring together again after 18 minutes.