18 November 2024

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5 February 2023

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2 November 2020

• curprev 15:5115:51, 2 November 2020 Brotherduck21 talk contribs 614 bytes +1 →Solution
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5 July 2013

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4 March 2012

• curprev 15:4215:42, 4 March 2012 Jmansuri talk contribs 599 bytes +599 Created page with "==Problem== If <math>a @ b = \frac{a\times b}{a+b}</math> for <math>a,b</math> positive integers, then what is <math>5 @10</math>? <math>\textbf{(A)}\ \frac{3}{10} \qquad\textb..."