No. 215

From the number 215 we can create a four-digit number that among its numbers manually type any other digit. Thus, we created two four-digit numbers whose difference is 120.

What two four-digit numbers that might be?

Correct result:

a =  2315
b =  2195


2X1521Y5=120 2X121Y=12 11Y=2 Y=9 2X1219=12 X=3 23152195=120 a=2315

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