Find the greatest common factor of 14x4 and 13x3.
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What is the LCM of 91 and 98?
The key is to find the prime factors of each number. To make things easier, start with larger factors of the number, and keep breaking them down to the primes:
91: 13 x 7
98: 49 x 2 = 7 x 7 x 2
Take the highest count of each prime number.
There are two 7s in 98, but only one 7 in 91, so take two 7s, 2 and 13.
Multiply these together: 7 x 7 x 2 x 13 = 1274.
Therefore, the LCM of 91 and 98 is 1274.
Greatest Common Factor
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