Table of Contents
- 1 How many ways can a 4 digit password be formed if repetition is allowed?
- 2 What is sum of all 4 digit numbers made by using 1 2 3 and 4 repetition of digit is not allowed )?
- 3 How to find sum of all 4 digit numbers formed using 0?
- 4 What is 24 as the sum of all 4 digit numbers?
- 5 How do you find the value of 0 with 4 digits?
How many ways can a 4 digit password be formed if repetition is allowed?
10,000 possible combinations
There are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code. Berry analyzed those to find which are the least and most predictable.
What is sum of all 4 digit numbers made by using 1 2 3 and 4 repetition of digit is not allowed )?
There are total 4^4 = 256 combinations. Each digit comes in every place 4^3 = 64 times. Sum of all digits in each place = 64 ( 1+2+3+4 ) = 640.
What is the sum of all of the four digit integers that can be created with the digits 1 2 3 and 4?
The smallest number that can be created from 1, 2, 3, and 4 is 1111, and the largest number possible is 4444. Then the average is (1111 + 4444)/2. So sum = 5555/2 * 256 = 711,040.
How to find sum of all 4 digit numbers formed using 0?
To find sum of all 4 digit numbers formed using 0 1 2 3, we have to find the sum of all numbers at first, second, third and fourth places. Let us find the sum of numbers at the first place (thousand’s place). In the 18 numbers formed, we have each one of the digits (1, 2, 3) six times at the first place.
What is 24 as the sum of all 4 digit numbers?
24 is the sum of numbers at unit’s place. So 24 is multiplied 1. The method explained above is not only applicable to find the sum of all 4 digit numbers formed using 0 1 2 3. This same method can be applied to find sum of all 4 digit numbers formed using any four digits in which one of the digits is zero.
How many 4-digit numbers can be formed using the given digits?
Since we form a 4 digit number, let us create 4 places. So, totally we may form 5 (24) = 120 numbers using the given digits. From the above steps, we may understand that we may see the number 1 in 24 times in the unit place. Find the sum of all 4-digit numbers that can be formed using digits 0, 2, 5, 7, 8 without repetition?
How do you find the value of 0 with 4 digits?
In the given four digits, one of the digits is “0”. Each one of three non-zero digits (1, 2, 3) will come at the thousand’s place 6 ( = K ) times in the 18 numbers formed using 0, 1, 2, 3 (Please see the 18 numbers above). And the digit “0” will come 6 ( = K ) times at the second place in the 18 numbers formed.