You need at least two numbers to have a product. 3 x 5 = 15
15 * 2, the product of 15 and 2, is 30And the product of 15 and 25, is 375And the product of 15 and 178, is 2770
An American Express card number has 15 digits.
The correct American Express number format is a 15-digit number starting with 3.
Answer
the product of 15 and a number by its self four times.
13*17 = 221
To express a composite number as the product of its prime factors.
The maximum number of digits in an American Express credit card number is 15.
An American Express card number starts with the number 3 and is 15 digits long.
An American Express card number consists of 15 digits, typically starting with the number 3.
An American Express credit card number has 15 digits.
An American Express card number is typically 15 digits long.