10
4000/10 = 400
-1000
There are 400. Assuming the number must be at least 10,000, then: In a 5 digit palindrome, the first and last digits must be the same, and the second and fourth digits must be the same; and: For the first and last digit there is a choice of 4 digits {2, 4, 6, 8}; For each of these there is a choice of 10 digits {0, 1, ..., 9} for the second and fourth digits; For each of the above choices these is a choice of 10 digits {0, 1, ..., 9} for the third digit; Making 4 x 10 x 10 = 400 possible even 5 digit palindromes.
10 squared is 100. 20 squared is 400. 225 is between 100 and 400. Its square root will be between 10 and 20.
410
189 palindromes.
99 palindromes.
99 palindromes.
There are 10 palindromes divisible by 9 between 1000 and 9999.
10 - 101,111,121, ...
1089 palindromes
there are 90 palindromes in 100 to 1000 As; 10 palindromes in each 100 and upto 1000, there are 9 hundreds.Therefore; 9 into 10 is equal to 90
Whole number palindromes between 10 and 40 are: 11, 22, 33 There are, in theory, an infinite number of palindromic decimal numbers in between - but just three palindromic integers.
99 of them.
10
10