Multiple Multiples
List 5 multiples of 4.
4,8,12,16,20,24...40...400..
Is 6 a factor of 36?
Yes, 6 x 6 = 36
27 x 4
108
24 ÷ 8
3
Two lines that never cross are called __________.
parallel lines
Is 27 a multiple of 8?
No, 8, 16, 24, 32
Even numbers cannot make odd numbers.
List 5 prime numbers between 1 and 50.
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47
456 x 8
3,648
93 ÷ 4
23 R1
2
True or False: an odd number can never make an even number. Give proof.
False: two odd numbers make an even number
3 + 3 = 6, 11 + 11 = 22
Find all the factors of 42. (use the bookend strategy)
1,2,3,6,7,14,21,42
67 x 81
5,427
329 ÷ 7
47
True or False: all rectangles are squares. Prove it.
False: Rectangles must have 4 90 degree angles and two sets of parallel lines. Squares must have all this plus four equal sides.
Is 81 a multiple of 3?
Yes,
9x9 is 81 and 3 is a factor of 9.
10 x 3 = 30
10 x 3 = 30
7 x 3 = 21
Is 3 a factor of 114? Prove it.
Yes.
30 x 3 = 90
8 x 3 = 24
And the 3 divisibility rule.
334 x 55
18,370
3,214 ÷ 5
642 R4
A triangle with two equal lines and all acute angles is called a ________________ triangle
acute isosceles triangle
What is a multiple of 3 and 7 that is not 21?
42, 63, 84 any multiple of 21
What is the greatest common factor of 24 and 72?
24
598 x 283
169,234
16,394 ÷ 4
4,098 R2
What is the plural of the word vertex.
vertices