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Topic: MIT Math Diagnostic for Physics Placement
Replies: 17   Last Post: Oct 24, 2012 12:51 PM

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Dave L. Renfro

Posts: 4,792
Registered: 12/3/04
Re: MIT Math Diagnostic for Physics Placement
Posted: Oct 24, 2012 10:51 AM
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Dave L. Renfro wrote (in part):

> Problem A1: They should say that k is an integer. Otherwise,
> a correct answer would be (1/2) x 10^(log 2x), where x equals
> the given numerical expression.

I just noticed that they explicitly said 'A' (the mantissa)
was to be greater than or equal to 1 and less than 10. O-K,
then even in that case there are uncountably many correct answers:

For each real number A such that 1 <= A < 10 (e.g. A = 1), use

A x 10^[(log y/A)],

where y equals the given numerical expression.

Dave L. Renfro

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