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There are 90 four-digit palindromes
What else can I help you with?
How many palindromes have 6 digits?
There are 900 6-digit palindromes.
How many different palindromes are there with 6 digits?
For there to be palindromes, each digit must be replicated. Therefore there are at most three distinct digits.If there are 3 pairs of different digits, then there are 6 palindromes. If there can be more duplicate digits, then there are 27 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.
How many positive four-digit integer palindromes have 12 as the sum of the digits of the munber?
81
How many ten digit palindromes are there?
90000. With 10 digit palindromes, the last 5 digits are the same as the first 5 digits in reverse, eg 12345 54321. So it comes down to how many 5 digit numbers are there? They are the numbers "10000" to "99999", a total of 99999 - 10000 + 1 = 90000.
How many three-digit palindromes can you make using only the digits 1 and 2?
111, 121, 222, 212
How many different three-digit palindromes can you make using only the digits 1 and 2?
111, 121, 212, 222
How many different three digit palindromes can you make using only the digits 1and 2?
There are two possible digits for the first and last digit, and two possible digits for the centre digit, making 2 × 2 = 4 possible 3 digit palindromes from the set {1, 2}, namely the set {111, 121, 212, 222}.
How many positive four-digit integer palindromes have 12 as the sum of the digits of the number?
Six. 1551 2442 3333 4224 5115 6006
How many palindromes are there between 1 and 400?
48 palindromes.
How many palindromes are between 300 and 700?
40 palindromes.
How many palindromes are there between 10 to 1000?
99 palindromes.
