Answer:
Therefore, the largest number that can be formed with AB as a prime 2-digit number and C and D each a prime 1-digit number is 9753.
Explanation:
To find the largest number that can be formed with AB as a prime 2-digit number and C and D each a prime 1-digit number, we need to determine the values of A, B, C, and D.
1. AB as a prime 2-digit number: The largest prime 2-digit number is 97. So, A = 9 and B = 7.
2. C and D as prime 1-digit numbers: Prime 1-digit numbers include 2, 3, 5, and 7. Since we have already used 7 for B, we can assign C = 5 and D = 3.
3. Forming the largest number: The largest number that can be formed with these digits is 9753.
Therefore, the largest number that can be formed with AB as a prime 2-digit number and C and D each a prime 1-digit number is 9753.