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The HCF of 2472,1284 and a third number n is 12. If their LCM is 2²×3²×5×10³×107, then the number n is?
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The HCF of 2472,1284 and a third number n is 12. If their LCM is 2²×3²...
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The HCF of 2472,1284 and a third number n is 12. If their LCM is 2²×3²...
To find the third number, we need to first find the prime factors of the given LCM and the given HCF.

Given LCM: 2² × 3² × 5 × 10³ × 107

Given HCF: 12

Finding the Prime Factors of LCM:
1. The prime factors of 2² are 2 and 2.
2. The prime factors of 3² are 3 and 3.
3. The prime factors of 5 are 5.
4. The prime factors of 10³ are 2, 2, 2, 5, and 5.
5. The prime factors of 107 are 107.

Prime Factors of LCM: 2, 2, 3, 3, 5, 2, 2, 2, 5, 5, 107

Finding the Prime Factors of HCF:
1. The prime factors of 12 are 2, 2, and 3.

Prime Factors of HCF: 2, 2, 3

To find the third number, we need to cancel out the common prime factors between the LCM and HCF, leaving only the unique prime factors.

Cancelling out Common Prime Factors:
1. Cancel out two 2's from the LCM and HCF.
2. Cancel out one 3 from the LCM and HCF.

Remaining Prime Factors: 5, 2, 5, 107

The third number, n, is the product of the remaining prime factors: 5 × 2 × 5 × 107 = 5² × 2 × 107 = 5350.

Therefore, the number n is 5350.
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