Flash Cards on Balanced Parentheses

Programmers recognize a set of balanced parentheses in a flash. See if you do. Rate each set of parentheses as balanced or not. Spaces in the expression do not affect if the parentheses are balanced or not. Sometimes spaces can be deceptive.

Parentheses Balanced or NOT?

Questions so far       Number Right:       Number Wrong:   


Instructions:   Click on button 1 to see an expression. Mentally decide if the expression is balanced. Click on button 2 to see the correct answer. Then click on the "Right" or the "Wrong" button as appropriate. Repeat.

Correctly answered questions are removed from the deck of flash cards. Incorrectly answered questions go back into the deck. The program stops when all questions have been answered correctly.

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