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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

Double sunglasses

Act 1

A video shows two pairs of sunglasses, each with 50% tint. What will be the percent tint for both pairs combined?

Act 3

A video reveals what the combined tint will be.

Sequel

Using glasses with 5% tint, how many will be needed to achieve a target of 60% tint?

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