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Eye Strain Score Calculator Knowledge Check
Sharpen your eye strain score calculator skills with algorithmically generated problems. Each attempt produces unique values to test your formula knowledge.
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A user's strain index is defined as (Screen Hours 4 * 15) / (Breaks per day 1 + 1). If you spend 4 hours on screen and take 1 breaks, what is your strain index? (Round to the nearest whole number).
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