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Example:
First four multiples of 2
1, 2, 3, 4
2, 4, 5, 10
2, 4, 6, 8
Example:
4 . 4 . 4 = _____
34
43
82
Example:
If 2n = 8, then n = ?
8
3
2
Example: Lucy had 1 blue, 3 green and 4 red pens. What type of a ratio is 3:4??
whole to part
part to whole
part to part
Example:
0.5 - 0.2
0.5
0.3
0.7
Example: 1, __ , 3, 4, 5; mean=3
Step 1: Let N be the missing number.
Step 2: We know, Mean = (Sum of all numbers)/(Number of numbers);
Therefore, Sum of all numbers = Mean x Number of numbers
→ 1 + N + 3 + 4 + 5 = 3 x 5 → N + 13 = 15 → N = 15-13 → N = 2
Step 1: Let N be the missing number.
Step 2: We know, Mean = (Sum of all numbers)/(Number of numbers);
Therefore, Sum of all numbers = Mean x Number of numbers
→ 1 + N + 3 + 4 + 5 = 3 x 5 → N + 13 = 15 → N = 15-13 → N = 2
Example: What is twice the radius?
chord
diameter
circumference
Example:
0.23 - 0.15
0.05
0.08
0.07
Example: -22
22
-22
-20
Example:
Common multiples of 2 and 3
6, 12, 18,...
2, 3, 6, ...
6, 9, 12, ...
Example:
What are the factors of 82?
2
9
41
28
Example:
What is the greatest common factor of 15 and 33?
Factors of 15 → 1, 3, 5, 15
Factors of 33 → 1, 3, 11, 33
Common Factors → 1, 3
Greatest Common Factors → 3
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