Overthrow your math teacher!
Some numbers are very mysterious.
They are all integers.
They have more than one digit.
If you multiply them with 2 their digits may shift ,but no new digit will include or no digit will disappear.
Example: 12 is not such a number. Because if you multiply 2 with 12, it will become 24. And 24 includes a new digit 4 ,and fails to obtain the previous digit 1.
Can you find one of them?
These type of numbers are called cyclic numbers where a number multiplied by any digit the result will contain all the digit in the original number and no other digit.
cyclic numbers are generated by full reptend prime 7,17,19,23 etc.
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