Rules of Divisibility
Which of these Numbers are divisible by 3?
51, 82, 104, 117
51 and 117
What are the prime factors or 49?
Only 7
Order each set of numbers from smallest to largest
23, -17, -18, 18, 4
-23, -18, -17, 4, 18
What is the value of the hundreds digit in 9786
7 hundred or 7
The first three Common Multiples of 3 and 4
12, 24 and 36
Is 1929 divisible by 6? Explain why
No (Because it is divisible by 3 but not 2)
I have spotted a pattern: 7, 13, 17, 23. I think that 27 must also be prime because it comes next in the pattern. True or False.
False
Complete this sequence
5, 3, 1, -1, _, _
5, 3, 1, -1, 3, 5
The tenths digit in 123.99
9
List out the factors of 40.
1, 2, 4, 5, 8, 10, 20 and 40
Which of these numbers are divisible by 9? Explain how do you know?
6666 9162 7557 2377
9162 (A number is divisible by 9 if the sum of its digits is divisible by 9)
List the prime numbers between 20 and 30
23 and 29
Last hour the temperature was 4 and now it is -2. The temperature difference is 6. (Use a Number line if needed. ) True or False?
True
The hundredths digit in 2.71
1 or 0.01
Prime factors of 54
2 and 3
Which of these numbers are divisible by 4? How will you find out?
6520 7654 9888
6520 and 9888 (A number is divisible by 4 if the las two digits are divisible by 4)
Is 87 prime or composite?
Composite
Last night the temperature was -15 degrees C. Early in the morning it was 6 degrees. Did it increase or decrease? By how much?
It increased by 21 degrees C
What is the value of ten thousands digit in 150,635.7?
50,000
The first three common multiples of 2, 3 and 5.
30, 60, 90