6 (a) The factorial of an integer number is the product of all the integers from that number down
to 1.
In general, the factorial of n is n × (n-1) × ... x 2 x 1
For example, the factorial of 5 is 5 × 4 × 3 × 2 × 1 = 120
In this question, n will be referred to as the BaseNumber.
A function FindBaseNumber() will:
• be called with a positive, non-zero integer value as a parameter
• return BaseNumber if the parameter value is the factorial of the BaseNumber
• return -1 if the parameter value is not a factorial.
For example:
Parameter value Value returned
120 5
12 -1
6 3
1 1
FindBaseNumber(12) will return -1 because 12 is not a factorial.
You may use the rest of this page for rough working.

Question

6 (a) The factorial of an integer number is the product of all the integers from that number down
to 1.
In general, the factorial of n is n × (n-1) × ... x 2 x 1
For example, the factorial of 5 is 5 × 4 × 3 × 2 × 1 = 120
In this question, n will be referred to as the BaseNumber.
A function FindBaseNumber() will:
• be called with a positive, non-zero integer value as a parameter
• return BaseNumber if the parameter value is the factorial of the BaseNumber
• return -1 if the parameter value is not a factorial.
For example:
Parameter value Value returned
120               5
12                -1
6                 3
1                 1
FindBaseNumber(12) will return -1 because 12 is not a factorial.
You may use the rest of this page for rough working.

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