Palindrome is a number which has same value even the digit is reversed...
Introduction:
A palindrome is a number that remains the same even when its digits are reversed. In this question, we are required to find the number of 5-digit numbers whose third digit is the cube of the first and the second digit.
Approach:
To solve this problem, we can follow a step-by-step approach.
Step 1: Determine the range of the first digit
Since the first digit can be any number from 1 to 9 (as a 5-digit number cannot start with zero), the range of the first digit is from 1 to 9.
Step 2: Determine the range of the second digit
The second digit can be any number from 0 to 9, as there are no restrictions on its values.
Step 3: Determine the range of the third digit
The third digit is the cube of the first digit. Since the first digit can take the values from 1 to 9, the cube of the first digit can take the values from 1^3 to 9^3, i.e., 1 to 729.
Step 4: Determine the range of the fourth digit
The fourth digit can be any number from 0 to 9, as there are no restrictions on its values.
Step 5: Determine the range of the fifth digit
The fifth digit is the same as the first digit, as the number is a palindrome. Therefore, the range of the fifth digit is the same as the range of the first digit, i.e., 1 to 9.
Step 6: Calculate the number of 5-digit numbers
To calculate the number of 5-digit numbers, we need to multiply the number of possibilities for each digit. Therefore, the number of 5-digit numbers is given by:
Number of 5-digit numbers = Number of possibilities for the first digit * Number of possibilities for the second digit * Number of possibilities for the third digit * Number of possibilities for the fourth digit * Number of possibilities for the fifth digit
Step 7: Calculate the total number of 5-digit numbers
By multiplying the number of possibilities for each digit, we can calculate the total number of 5-digit numbers satisfying the given conditions.
Conclusion:
In this way, we can determine the number of 5-digit numbers whose third digit is the cube of the first and the second digit.
Palindrome is a number which has same value even the digit is reversed...
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