Want this question answered?
64
An even number whose digits add up to 9 or a multiple of 9.
Two-digit prime numbers whose digits add up to 10 are:193773
992
66
64
The number is 85.
64
The answer is 66.
18
An even number whose digits add up to 9 or a multiple of 9.
Two-digit prime numbers whose digits add up to 10 are:193773
992
18
67
22
66