Use the numbers 0,1,2,3,4,5,6 to form a four digit number without repetition, in which the sum of the numbers in the individual, ten and hundred digits is the even four digits Use the numbers 0,1,2,3,4,5,6 to form a four digit number without repetition. How many four digit numbers are there in which the sum of the numbers on the one digit, ten digit and hundred digit is even? Answer: 324 to solve the problem!

Use the numbers 0,1,2,3,4,5,6 to form a four digit number without repetition, in which the sum of the numbers in the individual, ten and hundred digits is the even four digits Use the numbers 0,1,2,3,4,5,6 to form a four digit number without repetition. How many four digit numbers are there in which the sum of the numbers on the one digit, ten digit and hundred digit is even? Answer: 324 to solve the problem!

When the tens are all even, there are C 34 * P 33 * C 14-p 33 = 90;
There are 234 kinds of C 23 * C 14 * P 33 * P 14-c 23 * C 13 * P 33 = 234 when there are two odd and even tens
There are 90 + 234 = 324 species
This topic is first selected from the even or odd number, and then arranged, word limited, shake things!