3! = 6.
210
There are 2 choices for every digit in the 6-digit number. So 26 is 2*2*2*2*2*2. The answer to that is 64.
There are 5 numbers which can make the 3 digit numbers in this example. Therefore each digit in the 3 digit number has 5 choices of which number can be placed there. Therefore number of 3 digit numbers = 5 x 5 x 5 = 125
24680
To create a numeric palindrome using two-digit numbers, take a two-digit number, such as 23, and reverse its digits to form 32. Then, combine the two numbers to create a three-digit palindrome by placing the first number before the reversed second number, resulting in 232. Thus, any two-digit number can generate a three-digit palindrome by following this method.
From left to right, pick the smallest possible digit every time. This will give you the smallest possible number.
Number of 7 digit combinations out of the 10 one-digit numbers = 120.
210
There are 2 choices for every digit in the 6-digit number. So 26 is 2*2*2*2*2*2. The answer to that is 64.
There are 5 numbers which can make the 3 digit numbers in this example. Therefore each digit in the 3 digit number has 5 choices of which number can be placed there. Therefore number of 3 digit numbers = 5 x 5 x 5 = 125
24680
To create a numeric palindrome using two-digit numbers, take a two-digit number, such as 23, and reverse its digits to form 32. Then, combine the two numbers to create a three-digit palindrome by placing the first number before the reversed second number, resulting in 232. Thus, any two-digit number can generate a three-digit palindrome by following this method.
625×2=1250
88,888
123478
1,023.
998,000