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Brain Exerciser Calculator keeps adult minds active with a simple but challenging math drill. Easily choose the number of math drill problems in increments of 25, 50 or 100. The Brain Exerciser calculates your score based upon speed and accuracy of responses. Top three scores are stored in the calculator's memory. Offers a 10 + 2 digit slant display with punctuation, several math games. Can track and store up to three previous performances.