Tracy Bignell
2.1 pages 122-123
10. List the factors of 66.
A.
2,3,6,11,22,33
2x33=66, 3x22=66, 6x11=66
14. List the composite numbers
0,1,15,19,23,31,49,55,59,87,91,97,97,103,105
A. 15,49,55,87,91,105.
16. List the prime numbers between 55-75
A. 59,61,67,71,71,73,
22.
Social science.
Dr. Mento has a class of 80
students. For a group project, she wants to divide
the students into groups of 6, 8, or 10. Is this
possible? Explain your answer.
The students can be separated into groups of 8, or
10, but not 6.if the students are divided into groups
of 6 there will be 13 groups of 6 and one group of
two. The teacher can either have 8 groups of 10 or
10 groups of 8.
13r2
10
8
6÷80
8÷80
10÷80
6
8
80
11
00
00
20
0
18
0
r2
2.2 pages 131-132
20. Find the prime factorization of 330
330=33 x 10
11x3x2x5=330
24. Find two factors of 28 with a sum of 11.
4,7
28=14x2
28=4x7
4+7=11
42. Find the greatest common factor for 36, 72,
and 144.
GCF 36
(36)
1, 2,3,4,6,9,12,18,36
(72)
1,2,3,4,6,8,9,12,18,24,36,72
(144) 1,2,3,4,6,9,12,16,24,36,48,72,144
2.3 pages 142-144
8
. 3
7
18.
Business and finance.
At lunch, 5 people out
of a group of 9 had hamburgers. What fraction
names the part of the group who had hamburgers?