Which of the following are palindrome numbers?

343

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1999

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1231

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12321

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Solution

The correct option is D 12321
Palindrome numbers reads the same when the digits are reversed.

Original: 343
Reversed: 343 $✓$

Original: 1999
Reversed: 9991 $✘$

Original: 1231
Reversed: 1321 $✘$

Original: 12321
Reversed: 12321 $✓$

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