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The first digit can be any one of nine (all except zero). For each of those . . .
The second digit can be any one of ten.
Total possibilities for the first two digits = 9 x 10 = 90.
Since the 4-digit number is a palindrome, the 3rd and 4th digits are determined
by the 1st and 2nd ones.
So the total number of 4-digit palindromes is the same as the number of possibilities
for the first 2 digits = 90 .
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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 4-digit palindromes are there?
There are 90 four-digit palindromes
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 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.
