They're all prime numbers; 1 is the lcd * * * * * Sorry about the ignorance that permeates WA. First, they are not all primes, since 4 = 2*2 Also, the above answer refers to the HCF, not the LCD. The correct answer is 84
To find the lcd of any set of numbers, you must find the lowest number which all of the numbers in the set can divide evenly into. For example, to find the lcd of 7,8, and 9, you must first see if there are any numbers that can divide by 2 of the three numbers in the set. An example of such a number is 56. 56/7 = 8 56/8 = 7 Once you have a number like this, the final step is to multiply that number by the other number in the set that does not divide into it (in this case, 9) 56x9 = 504 So, the lcd of 7, 8, and 9 is 504.
LCD = 119 (7x17=119)
Since 11 and 17 are both prime, you multiply them together to get the LCD which comes out to be 187.
There is only one lowest common factor for primes: 1 All three numbers are prime, so the LCM is going to be their product: 105 ■
Prime numbers are used to find the LCM of numbers Prime numbers are used to find the HCF of numbers Prime numbers are used to simplify fractions Prime numbers are used to find the LCD of fractions
You need at least two numbers to find an LCD.
Because these are all prime numbers, the LCD will be 1. It'll also be the GCF.
The two numbers are relatively prime, since 11 is a prime number and it doesn't evenly divide 24, so the LCM (the LCD of two fractions is the LCM of their denominators) is just their product: 264.
Finding the prime factorisation of both denominators makes it easier to find the LCD. Simply make two columns, one for each denominator, and write the prime factors side by side. For each factor, note the larger exponent; then multiply out the list.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.
You need at least two numbers to find something in common.