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This is a brand new rich result, designed for websites that provide practice questions for maths and science topics, to help students and teachers find your educational and learning material more easily. You can mark up your page with structured data to make your practice questions eligible to appear in Google Search results.
The practice problems feature is available in English in all regions where Google Search is available. The feature is only available for math and science topics, for multiple choice and checkbox question types, and on desktop and mobile.