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If the product of first fifty positive consecutive integers be divisible by 7n, where n is an integer, then the largest possible value of n is       (SSC CGL 1st Sit. 2014)
  • a)
    7
  • b)
    8
  • c)
    10
  • d)
    5
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If the product of first fifty positive consecutive integers be divisib...
Product of first fifty positive consecutive integers = 1 × 2 × .... × 50 = 50 !
Largest possible value of n 
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If the product of first fifty positive consecutive integers be divisib...
To find the largest possible value of n, we need to determine the highest power of 7 that divides the product of the first fifty positive consecutive integers.

Prime Factorization of 7:
7 is a prime number, and its only prime factor is 7 itself.

Prime Factorization of the Product of the First Fifty Positive Consecutive Integers:
To find the prime factorization of the product of the first fifty positive consecutive integers, we need to determine the powers of each prime number that divides the product.

Prime Factorization of the Product of the First Fifty Positive Consecutive Integers:
To find the prime factorization of the product of the first fifty positive consecutive integers, we need to determine the powers of each prime number that divides the product.

The highest power of 7 that divides the product of the first fifty positive consecutive integers is 7^8.

Thus, the largest possible value of n is 8.

Explanation:
When we consider the product of the first fifty positive consecutive integers, we can observe that there are several factors of 7 present in the product. To determine the highest power of 7 that divides the product, we need to count the number of factors of 7 in the product.

To count the number of factors of 7, we can divide each number in the product by 7 and count the number of times the division is exact. For example, if we divide 49 (7^2) by 7, we get 7, which is exact. Therefore, 49 contributes 2 factors of 7 to the product.

By applying the same process to each number in the product, we can count the total number of factors of 7. In this case, we find that there are 8 factors of 7 in the product. Therefore, the highest power of 7 that divides the product of the first fifty positive consecutive integers is 7^8.

Since n represents the highest power of 7 that divides the product, the largest possible value of n is 8.
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