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Example:
B
C
A
80o
40o
55o
Example: Find the mean of the following: 1, 2, 3, 4, 5
Step 1: Find the sum of all numbers → 1+2+3+4+5 = 15
Step 2: Divide total by the number of numbers → 15 ÷ 5 = 3
Step 1: Find the sum of all numbers → 1+2+3+4+5 = 15
Step 2: Divide total by the number of numbers → 15 ÷ 5 = 3
Example:
LCM (least common multiple) of 3 and 6
3
6
9
Example:
Prime factors of 12
2, 2, 3
2, 3, 3
2, 3, 6
Example:
4
6
+
5
6
3
6
1
9
9
6
Example:
2
6
+
1
2
1
6
2
3
5
6
Example: I am made of a vertical and a horizontal line. Who am I?
right angle
Example: Find the median of the following: 1, 2, 1, 5, 5
Step 1: Sort the list → 1, 1, 2, 5, 5
Step 2: Count of numbers listed → 5 (odd)
Step 3: So the middle number is (count+1)/2 → (5+1)/2 → 3rd number. Therefore, the median is 2.
Step 1: Sort the list → 1, 1, 2, 5, 5
Step 2: Count of numbers listed → 5 (odd)
Step 3: So the middle number is (count+1)/2 → (5+1)/2 → 3rd number. Therefore, the median is 2.
Example:
What are the factors of 82?
2
9
41
28
Example:
4.5
5.2
>
=
<
Example:
1.8
1.5
1.3
1.6
1.9
1.3
1.5
1.6
1.8
1.9
Example:
1)
5
6
2
1
3
2)
2
6
1
10
12
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