5 Questions
What is the greatest common factor (GCF) of 12 and 18?
6
Which of the following numbers is a composite number?
8
What is the expanded form of the number 3456?
3000 + 400 + 50 + 6
Express the number 6578 in scientific notation.
3 x 10^-6
Find the least common multiple (LCM) of 9 and 12.
36
Study Notes
Greatest Common Factor (GCF)
- The GCF of 12 and 18 is 6.
Composite Numbers
- A composite number is a positive integer that has more than two factors.
- 9 is a composite number because it has factors 1, 3, and 9.
Expanded Form
- The expanded form of the number 3456 is 3,000 + 400 + 50 + 6.
Scientific Notation
- The number 6578 can be expressed in scientific notation as 6.578 × 10^3.
Least Common Multiple (LCM)
- The LCM of 9 and 12 is 36.
Test your knowledge of grade 8 math concepts with this quiz on expanded form, scientific notation, prime and composite numbers, and finding the greatest common factor (GCF) and least common multiple (LCM). Can you identify examples of expanded form, determine the GCF of two numbers, and recognize composite numbers?
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