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2019 NSW: Maths Puzzle 6

6th puzzle by Dr Harry Wiggins (Reverse fun)

Did you know 2178 x 4 = 8712?

Find all ten-digit numbers which becomes 9 times bigger if the order of the digits is reversed.

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2019/08/09 5:51 PM
1 099 999 989
2019/08/12 7:43 AM
Dear Phillip, you are correct.

1099999989 x 9 =9899999901

However there is a second 10-digit number with this property. Who can find the second one?
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