Two studies were conducted to test the link between numerical distinctiveness, stereotype threat and mathematical performance among women. In the first study, stereotype threat was measured with a stereotype activation task. Women in a solo, non-solo or control condition completed word fragments and a mathematical activity. Solo women, rather than their non-solo counterparts showed mathematical performance deficits. Evidence did not support the mediating role of stereotype activation. In the second study, stereotype anxiety was assessed. According to analyses, solo women reported greater stereotype-related anxiety than non-solo women. A link between stereotype anxiety and mathematical performance deficits was also uncovered. Finally, mathematical underperformance was associated with greater interest in feminine activities. Strategies to buffer the effects of stereotype threat are discussed. (Contains 2 tables and 2 notes.)