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September 28, 2016
Posted by **Please Help ** on Tuesday, February 7, 2012 at 4:16pm.

- Math Challenge -
**bobpursley**, Tuesday, February 7, 2012 at 4:33pmwell, the second digit must be 9 more than the third. as in 09...or, it is the complement to 9 (as in 1), as in X23,so the switched is X32 (nine more).

Complements: N,N+1 (as in 12, 23, 32, 43, and so on.

Not the second hint..the first and second:

BAx-ABx=90 so a,b must be complements also, as above.

Lets check; 123

first hint: 132-123=9

second hint:213-123=90 checks

Lets check another: 456

first hint: 465-456=9

second hint:546-456=90 checks.

so there are a multitude of answers for what the number is.

HOWEVER, the answer to the question asked is interesting.

In the first case, 321-123=198

in the second case,654-456=198

hmmmm, very interesting. Why don't you try a few more?