The number of four digit numbers can be formed with the digits 1,2,3,4,5,6 when a digit may be repeated any number of times in any arrangement is
=5P4=(5×4×3×2)=120. Particular case To get an even number, the unit's digit is 2 or 4. Thus, there are 2 ways of filling remaining 3 places with the remaining 4 digits =4P3=(4×3×2)=24. Hence, the required number of even numbers =(2×24)=48. Show More ...
Use the numbers 1, 2, 3, 4, 5, 6, 7, 8 to make two four−digit numbers without repeating digits. The largest possible product would be × . 相关知识点: 试题来源: 解析 8531;7642 To make the largest result, when the number of digits is fixed, you should make the digi...
Use the numbers 1 to 4 to form four-digit numbers where the digits of each number do not repeat. There are ( ) four-digit numbers that satisfy the above criterion. The sum of these numbers is ( ). 用1,2,3,4这四个数字组成没有重复数字不同的四位数.这样的四位数共有 个;它们的和是...
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Find the number of 4 digit numbers that can be formed using the digits 1,2,3,4,5 if no digit is repeated. How many of these will be even?
A CVV, or card verification value, is typically a three- or four-digit number found on a credit card. CVV numbers add an extra layer of security for your credit card. A CVV is different than the PIN associated with your credit card. If you ever use your credit card to make an online...
To make the largest result, when the number of digits is fixed, you should make the digit in the hundreds place as large as possible.So, for the these two three−digit, 6, 5 and 4 should be in the tens place, and 1, 2 and 3 should be in the ones place. Given an unchange...
four-digit number which is a multiple of 5. ___ 相关知识点: 试题来源: 解析 7325 要组成最大的四位数且是5的倍数,末位必须是5(因无0)。剩余数字3、7、2需排列成最大的前三数。按降序排列为7、3、2,故组合为7325。验证其为四位数且无重复,且末位为5满足条件。反馈 收藏...
Answer to: How many distinct four-digit numbers can be made out of the digits 1, 2, 3, and 9, which are less than 3,000 and repetition of the...