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My Digit's sum is 30. Read me forward or backward, i am still the same. if you round me up to the nearest hundred thousand, i will be 600 000. What number am i

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Final answer:

The number the student is referring to is 555555. This number is a palindrome (it reads the same forwards and backwards), its digits add up to 30, and when rounded to the nearest hundred thousand, it becomes 600,000.

Step-by-step explanation:

The number the student is referring to is a unique number that meets all three conditions: its digits add up to 30, it can be read the same way forwards or backwards (making it a palindrome), and when rounded to the nearest hundred thousand, it becomes 600,000. The only number that fits all these criteria is 555555. Here's how:

  • The digits in 555555 sum to 30 (5+5+5+5+5+5=30).
  • It can be read the same way both forwards and backwards, making it a palindromic number.
  • When rounded to the nearest hundred thousand, it becomes 600,000.

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