On Friday I posted this puzzle….
The other day my friend sent me this note:
‘I’ve changed the calibration dial on my bathroom scale, and so the readings are off by a consistent amount. When I am on the scale it reads 170 pounds, and when my wife is on it, it reads 130. When we stand on it together the scale reads 292 pounds. How should I adjust the scale?’
If you have not tried to solve it, have a go now. For everyone else, the answer is after the break.