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In the expansion of 7!, which factor comes immediately after 7?

Answer and explanation

Correct answer: 6

Factorial notation is defined for a positive integer n by n! = n × (n − 1) × (n − 2) × ... × 2 × 1. Applying this definition gives 7! = 7 × 6 × 5 × 4 × 3 × 2 × 1. The factors decrease by one at each step, so the factor immediately after 7 is 6. Therefore, option C is correct. Option A, 8, would appear at the beginning of 8!, not 7!. Option B incorrectly repeats the first factor, while option D is the last factor in the expansion, not the factor immediately following 7. The question tests direct recognition of the descending consecutive-product pattern used in factorial notation.

Related tags

Factorial NotationDescending ProductPermutations And CombinationsClass 11MathematicsClass 11 Mcq

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