There is a four digit number on the dog's collar. The last two digits constitute the smallest two even digits. The first digit is larger than the second digit and the first two digits What is the number of the dog neck cover
The minimum even number of two digits is 10. The first two digits are less than 5 times of the last two digits, that is, less than 5 times of 10, that is, 15, so the four digit number is 1510
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- 1. There is an even number of two digits, which can be divided by 5, and the number on its ten digits is even. How many two digits are there? What is the smallest of them?
- 2. I am a two digit number. The number on the ten digit is the largest even number in the one digit number. The number on the one digit is the smallest odd number. I am ()?
- 3. I am a two digit number, the number in ten is the largest even number in one digit, and the number in one digit is the smallest odd number (0.5.9.6) if the number composed is a multiple of 5, there are (), if the number composed is a multiple of 2 and a multiple of 5, there are (), if the number composed is a multiple of 3 and a factor of 90, there are () tips: select two number groups
- 4. 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!
- 5. A three digit number is not only a multiple of 2, but also a multiple of 5. The number in the hundreds is the smallest even number (except 0). The number in the tens is a multiple of the number in the hundreds How much is he
- 6. Use the number 0123456 to form a four digit number without repetition, in which the number of one digit, ten digit and hundred digit only have a few with the even four digit number
- 7. Use the numbers 0, 1, 2, 3, 4, 5 and 6 to form a four digit number without repetition, in which the sum of the numbers in the individual, ten and hundred digits is an even four digit number______ Answer with numbers
- 8. It is composed of numbers 1, 2, 3 and 4. Among the four digits without repetition, even numbers are common______ One
- 9. How many even numbers can be composed of 1, 2, 3 and 4? It is not said that they must be even numbers of four digits
- 10. The smallest and even four digit number is 0 1 2 3
- 11. For a three digit number, the number in the hundreds is 3 more than the smallest even number, and the number in the tens has only one factor. This three digit number is a common multiple of 2 and 5. What is it
- 12. Add three numbers after 17 to form five digits, so that the five digits are even and have factors 3 and 5 at the same time?
- 13. An odd number is a 2-digit multiple of 5. The sum of all its factors is 48. What is the number?
- 14. Within 100 is not only a multiple of 3, but also a factor of 5, in which the largest odd number is (), and the smallest even number is ()
- 15. A two digit number contains a factor of 3 and a multiple of 5. If the number is odd, what is the maximum; if it is even, what is the minimum I can't help you
- 16. A three digit number is not only a multiple of 3, but also a factor of 5. If the number is odd, the minimum number is (?), and the maximum even number is (?)
- 17. A three digit number is not only a multiple of 3, but also a factor of 5. If the number is odd, the minimum is (), if it is even, the maximum is ()
- 18. Use the five numbers of 0, 1, 2, 3 and 4 to form the five digit number without repetition, in which the even number has
- 19. Use the numbers 0, 1, 2, 3 and 4 to form a five digit number without repetition, then how many even numbers are adjacent to the numbers 1 and 2?
- 20. Use the five numbers 1.2.3.4.5 to form a three digit number without repetition. How many even numbers are there?