Grade 7 Mathematics · Strand 1: Numbers · Factors
Greatest Common Divisor by Factor Method
A short Grade 7 Mathematics lesson for the CBE curriculum, part of Numbers: Factors. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. Using the prime factor method, what is the Greatest Common Divisor (GCD) of 48 and 72?
- A. 12
- B. 24
- C. 36
- D. 6
2. Find the GCD of 84, 126 and 210.
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3. Two numbers are written as 2^3 × 3^2 × 5 and 2^2 × 3^4 × 7. What is their GCD?
- A. 72
- B. 36
- C. 1260
- D. 648
4. What is the name for the largest number that divides two or more given numbers exactly, with no remainder?
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5. A teacher in Kisumu has 56 pencils and 84 erasers. She wants to make identical packs using all the items, with nothing left over. What is the greatest number of packs she can make?
- A. 14
- B. 12
- C. 28
- D. 7
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