It is: 99
99
99
It is 99
97
The largest 2 digit composite number is 99.
How about 99
The largest staircase comosite largest staircase composite is the number 2223 because 1 is not counted as a prime so the 1 digit prime is 2, the smalles 2 digit prime is 11 and smallest 3 digit prime is 101
97A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 97 is the largest 2 digit prime number.
42 is composite, 43 is prime.
28 is an example of a 2 digit composite number because it has more than two factors.
97 is the largest 2-digit prime number.
43 is a 2 digit odd number but it is a prime number
10
43 is a 2-digit odd number. It is prime.
To be an even number then the final digit = 2. The largest single prime digit is 7 (as both 8 and 9 are composite). The greatest even number fulfilling the conditions is 77777772.
The last digit is a 2 which implies that the number is divisible by 2. So 46832 is not prime, it is composite.