zbMATH Open<p>W. W. Rouse Ball <a href="https://zbmath.org/authors/rouse-ball.w-w" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">zbmath.org/authors/rouse-ball.</span><span class="invisible">w-w</span></a>, known for his popular math book, was <a href="https://mathstodon.xyz/tags/botd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>botd</span></a> 175 years ago.<br>His book "Mathematical recreations and problems of past and present times" was reviewed in <a href="https://zbmath.org/23.0033.03" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="">zbmath.org/23.0033.03</span><span class="invisible"></span></a>.</p>