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**Abbey78336****Member**- Registered: 2022-08-15
- Posts: 37

A three digit number in base 7 changes to base 9 by reversing their digits what is that number

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**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 41,307

Hi,

It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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**Abbey78336****Member**- Registered: 2022-08-15
- Posts: 37

Thanx ganesh

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**Bob****Administrator**- Registered: 2010-06-20
- Posts: 9,635

hi Abbey78336 and Ganesh,

I'm getting another solution:

At this line b = 8(3a - 5c) there are two other posible b values to check, namely b =4 and b = 8

The first does not lead to a solution, but b = 8 does.

I'll leave the rest as an exercise.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Sometimes I deliberately make mistakes, just to test you! …………….Bob

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