Date: Oct 24, 2012 10:51 AM
Author: Dave L. Renfro
Subject: Re: MIT Math Diagnostic for Physics Placement
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