81.   The math problem is just one of several questions on a screening test developed by the provincial government to assess whether welfare recipients need reading and math training.

82.   They did not improve so much as better-off peers in advanced skills, like solving math problems, the study said.

83.   Under the circumstances, even the third-grade math problem becomes a brain teaser.

84.   Uncovering a new but relatively benign Internet vulnerability, researchers tricked Web servers around the world into solving math problems without permission.