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There are 90 palindromes with 4 digits.
The first digit can be any digit from the set {1,2,3,4,5,6,7,8,9}.
With each choice of the first digit, the second can be any digit from the set {0,1,2,3,4,5,6,7,8,9}.
That makes 9*10 = 90 permutations for the first two digits. These determine the palindrome since the third and fourth digits are the same as the second and first, respectively.
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How many 4-digit numbers are palindromes?
There are 90 such numbers.
How many 4-digit palindromes are there?
There are 90 four-digit palindromes
How many 4 digit palindromes are multiples of 9?
Nine. The sum of the digits must be a multiple of 9; because of the repeated digits, this is only possible if the first two digits add up to 9.
What digits are always the same in a 4-digit palindrome?
None. 1221 and 3443 are both 4-digit palindromes but no digit has remained the same between the two. First and fourth, second and third.
What is the smallest 4 digit palindrome that is the sum of 2 3 digitit palindrome?
The smallest 4-digit palindrome is 1001. To find if it can be expressed as the sum of two 3-digit palindromes, consider the smallest 3-digit palindromes, which are 101, 111, 121, etc. The combination of 101 and 900 (another 3-digit palindrome) gives 1001, making 1001 the sum of two 3-digit palindromes. Thus, the answer is 1001.
How many 4-digit numbers are palindromes?
There are 90 such numbers.
How many 4-digit palindromes are there?
There are 90 four-digit palindromes
How many 5-digit palindromes are multiples of 9?
-4
How many palindromes are there between 900 - 1900?
-1000
How many 4 digit palindromes are multiples of 9?
Nine. The sum of the digits must be a multiple of 9; because of the repeated digits, this is only possible if the first two digits add up to 9.
What digits are always the same in a 4-digit palindrome?
None. 1221 and 3443 are both 4-digit palindromes but no digit has remained the same between the two. First and fourth, second and third.
What is the smallest 4 digit palindrome that is the sum of 2 3 digitit palindrome?
The smallest 4-digit palindrome is 1001. To find if it can be expressed as the sum of two 3-digit palindromes, consider the smallest 3-digit palindromes, which are 101, 111, 121, etc. The combination of 101 and 900 (another 3-digit palindrome) gives 1001, making 1001 the sum of two 3-digit palindromes. Thus, the answer is 1001.
How many 4 digit numbers can be formed with the numders 5678 among these 4 digit numbers how many are smaller than 7000?
24
How many 9 digit numbers are palindromes?
A 9-digit palindrome has the structure where the first five digits determine the last four digits in reverse order. The first digit must be from 1 to 9 (to ensure it's a 9-digit number), giving us 9 options. The next four digits (the second to fifth digits) can each be any digit from 0 to 9, providing 10 options each. Therefore, the total number of 9-digit palindromes is (9 \times 10^4 = 90,000).
How many 2 digit numbers contain the digit 4?
17
How many 4 digit numbers are possible with no two numbers being adjacent?
There are 2941 4-digit numbers such no two of its digits differ by 1.
How do 3 digit numbers compare to 4 digit numbers?
3 digit numbers are lessthan 4 digit numbers
