There is no such number. If the four digits are even, the entire number is even, not odd.
5214, 4512, 2154, 2514 etc.
64.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
28
No, 11 is the only palindromic prime with an even number of digits.
999,998
88888888
7314
6*6*3 = 108 numbers.
9650 is the largest formed by re-ordering the digits.
How about 256
Try 130. Or how about 310.
A number is divisible by 4 if the number formed by its last two digits is divisible by 4.Equivalently, halve the number formed by the last two digits. If the quotient is even, then the original number is divisible by 4.
Assuming the question refers to the digits 1, 2, ... , 9 the answer is 1344 numbers.
9998
985
998 - 3 digits even number Next even number is 1000 - 4 digits. So 998 is the largest ...