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Chapter 1: Q.17 (page 21)

In the following exercises, find the least common multiple of each pair of numbers using the prime factors method.

55, 88

Short Answer

Expert verified

The least common multiple of 55 and 88 is 440.

Step by step solution

01

Step 1. Given information

The given numbers are 55 and 88.

The least common multiple of the given numbers is to be determined using prime factors.

02

Step 2. Calculating the prime factors

For prime factorization, the given number is to be factored such that all the factors are prime numbers.

55=5路11

The factors are all primes here and cannot be further factored.

88=2路4488=2路2路2288=2路2路2路11

The factors are all primes here and cannot be further factored.

03

Step 3. Calculating least common multiple

To determine LCM, the prime factors of both the numbers are to be considered and the factors that are present in both are to be taken whereas the repeated factors are to be taken only once.

LCM=2路2路2路5路11LCM=440

04

Step 4. Conclusion

Therefore, the least common multiple of 55 and 88 is 440.

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