10, 20, 30, 40, etc.
23
16
Probably 73.
It is 0.45
The number is 57.
The number must be 42.
9218 9425
89 is a prime number between 70 and 100 that has the ones digit one greater than the tens digit.
57
The prime number between 20 and 30 whose ones digit is 7 greater than its tens digit is 23. The tens digit is 2, and the ones digit is 3, which is 7 greater than 2. Additionally, 23 is a prime number because it is only divisible by 1 and itself, with no other factors.
452, 894. None other that I can think of
Any prime number greater than 10 is an odd number but cannot end in 5 as this makes it divisible by 5. Therefore the ones digit of any prime number greater than 10 must be 1, 3, 7 or 9.