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If you realize that a 4 digit palindrome is basically a two digit number followed by it's own reverse, you can re-phrase this question as 'how many two digit numbers are there?' Which would then mean that (if you're considering zeros as digits without a non-zero leading term) there would be a 4 digit palindrome 0000 for the two digit 00; a four digit 0110 for the two digit 01; 0220, 02; etc etc. So the number of four digit palindromes would be the same as the quantity of whole numbers from 00 to 99. So I believe the total answer to your question would be 100.
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How many four digit combinations are there for the numbers 1-6?
7
How many four-digit counting numbers are not multiples of 10?
8100
How many binary digits does a single hexadecimal digit represent?
four
How many four digit numbers are divisible by 36?
250 of them.
How many four-digit numbers consist of only even digits?
500
How many four digit palindromes are there?
There is 90 four digit palindromes.
How many four digit palindromes are perfect squares?
There are no four-digit perfect squares that are palindromes.
How many four digit in900to7000?
7000 - 999 ie 6001 four digit numbers
How many 4-digit palindromes are there?
There are 90 four-digit palindromes
How many positive four digit numbers have 7 as their second digit and 8 as their last digit?
90
How many significant digit does 2.723?
There are four of them
How many four digit EVEN numbers have all 4 digit distinct?
2240
How many significant digit are ther in 74.30?
Four
How many combinations are there for a four digit number?
64
How many four digit numbers are there in all?
9,000
How many four digit whole numbers are there such that the thousand digit is odd the hundreds digit is even and all four digits are different?
5*5*4*4 = 400
How many four-digit numbers can be formed if the leading digit cannot be zero?
There are 9 x 10 x 10 x 10, or 9000 four-digit number that can be formed if the leading digit cannot be zero.
