Piagets problem: The child tries to guess what the teacher/parent/questioner wants.
I never teach math. At least not in the school way of offering problems and asking questions about them. For example I 'tought' subtraction the following way:
(in the kitchen)
Me: "Please give me six potatoes." Him: "1, 2, 3" Me (putting them in the pot): "How many do we still need?" Him: "4, 5, 6" (thinking) "3 more."
A specific situation avoids guessing the password.
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