1) Find the LCM and HCF using both
prime Factorisation and common
division method :
42 ,36,18
Answers
Problem & Workout :
step 1 Address input parameters & values.
Integers: 18 36 42
lcm (18, 36, 42) = ?
step 2 Arrange the group of numbers in the horizontal form with space or comma separated format
18, 36 and 42
step 3 Choose the divisor which divides each or most of the integers of in the group (18, 36 and 42), divide each integers separately and write down the quotient in the next line right under the respective integers. Bring down the integer to the next line if the integer is not divisible by the divisor. Repeat the same process until all the integers are brought to 1.
LCM of 18, 36 and 42
6 18 36 42
3 3 6 7
2 1 2 7
7 1 1 7
1 1 1
step 4 Multiply the divisors to find the lcm of 18, 36 and 42
6 x 3 x 2 x 7 = 252
LCM(18, 36, 42) = 252
The least common multiple for three numbers 18, 36 and 42 is 252
Answer:
HCF is 3 .
LCM is 3024 .