1994 AHSME Problems/Problem 15
Revision as of 22:07, 27 June 2014 by TheMaskedMagician (talk | contribs) (Created page with "==Problem== For how many <math>n</math> in <math>\{1, 2, 3, ..., 100 \}</math> is the tens digit of <math>n^2</math> odd? <math> \textbf{(A)}\ 10 \qquad\textbf{(B)}\ 20 \qquad\t...")
Problem
For how many 
in 
is the tens digit of 
odd?
