The largest 2 digit composite number is 99.
99
There are an infinite number of both primes and composite numbers. There is no largest of either.
The smallest three digit composite number is 100, and the largest two digit number is 99. 100-99=1.
The largest composite number between 1 and 60 (inclusive) is 60. The largest composite number between 1 and 60 (exclusive) is 58.
As an even number, the largest composite number between 1 and 60 is 60.
The largest single digit composite number is 9. The largest prime number is 17 million digits long. The definition of a composite number is any number that has at least one positive divisor other than one or the number itself (it is not a prime number). The largest composite digit is therefore longer than the largest prime number by at leaf +1.
The smallest two-digit composite number is 10, which is the product of 2 and 5. The largest two-digit composite number is 99, which is the product of 3 and 33. To find the sum of the smallest and largest two-digit composite numbers, we add 10 and 99, resulting in 109.
No "largest" composite number exists.
There is no largest composite number. Nor is there a largest sequence of consecutive composite numbers - those sequences can become arbitrarily long.
99 is the largest composite number before 100.
The largest composite number between 1 and 50 is 50.