The study also found that D.C. schools have the widest achievement gap among Hispanic and white students. Based on the National Assessment of Educational Progress, the study is made up of reading and math exams taken by fourth- and eighth-grade students across the country.

The Washington Post’s Lyndsey Layton wrote about the results on Wednesday:

“On the fourth-grade math test, for example, black students in the District scored an average of 223 points out of a possible 500 while their white classmates averaged 272, or 49 points higher. That difference is more than twice the national achievement gap for that test.”

Curious how your math skills stack up? See if you can answer questions from the National Assessment of Educational Progress.

Test your skills on the quiz below:

More news from PostLocal:

D.C.’s best barbecue: And the winner is...

No charges in GW grad student’s death

Haynesworth exonerated in rape cases

Postal workers behaving badly