1.)find lcm and gcf of 9 and 20
with solution*
2.)find lcm and gcf of 7 and 15
with solution*
3.)find lcm and gcf of 11 and 15
with solution*
with solution*
2.)find lcm and gcf of 7 and 15
with solution*
3.)find lcm and gcf of 11 and 15
with solution*
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solution:
the prime factors of 9 are 3x3
the prime factors of 20 are 2x2x5
multiply all the prime factors so the answer is 1.
lcm of 9 and 20 is 180.
sol:
prime factorization of 9 is the same (3x3)
prime factorization of 20 is the same (2x2x5)
multiply 2x2x3x3x5 = 180
2. gcf of 7 and 15 is 1.
sol:
prime factor of 7 is 7.
prime factors of 15 is 3x5
multiply all the prime factors and the answer will be 1
lcm of 7 and 15 is 105.
sol:
prime factor is the same (7)
prime factors is the same (3x5)
multiply 3x5x7 = 105
3. gcf of 11 and 15 is 1.
sol:
prime factor of 11 is 11
prime factor of 15 is 3x5
multiply all the prime factors and then the answer will be 1.
lcm of 11 and 15 is 165.
sol:
prime factor is the same (11)
prime factor is the same (3x5)
multiply 3x5x11 = 165
hope this helps!:)