Understanding LCM and GCF

What is the first step in solving a problem involving LCM and GCF according to the video?

• Think forwards from the GCF

• Think backwards from the LCM

• Use a calculator

• Guess the numbers

When dividing 840 by 5, what is the remainder after dividing 34 by 5?

• 3

• 2

• 5

• 4

Which number is identified as a factor of 840 because it ends in zero?

• 2

• 3

• 5

• 7

What are the prime factors of the GCF mentioned in the video?

• 2 and 5

• 5 and 7

• 3 and 7

• 2 and 3

How does the instructor suggest ensuring all prime factors are accounted for?

• By circling all the primes

• By using a calculator

• By guessing the numbers

• By writing them in a notebook