Highest Common Factor (HCF)

There are $40$ girls and $32$ boys, who want to participate in state-level games competition. If each team must have the same number of girls and the same number of boys.

What is the maximum number in each team that can participate in state-level games?

How many boys and girls will be on each team?

Ramu has $16$ blue marbles and $12$ white ones. If ha wants to arrange them in identical groups without leaving any marbles. What is the maximum number in each group Ramu can make? 

Find the HCF for the pair of numbers $14, 42$. What do you observe?

Find the HCF for the pair of numbers $4, 12$. What do you observe?

Find the HCF for the pair of numbers $5, 15$. What do you observe?

Find the HCF for the pair of numbers $4, 16$. What do you observe?

Find the HCF of the pair of numbers $80$ and $100$ by writing common factors.

Find the HCF of the pair of numbers $12$ and $18$ by writing common factors.

Find the HCF of the pair of numbers $16$ and $36$ by writing common factors.

Find the HCF of the pair of numbers $33$ and $39$ by writing common factors.

Find the HCF of the pair of numbers $34$ and $20$ by writing common factors.

Find the HCF of the pair of numbers $21$ and $28$ by writing common factors.

Find the highest common factor of the prime numbers $5$ and $7$.

Find the HCF of $15$ and $22$.

Find the HCF of $9$ and $27$.

Find the HCF of $13$ and $39$.

Find the HCF of $8$ and $12$.

Find the HCF of $16$ and $20$.

Find the HCF of $10$ and $20$.

Find the greatest common divisor of the following:

$20$ and $35$