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Excel in math and science
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Basic Mathematics
Basic Mathematics Warmups
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Concept Quizzes
Using the properties of decimals and the distributive rule, can you quickly find \( 15\% \) of 64?
Hint: \( 15 \% = 10\% + 5\% \).
Excel in math and science
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It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
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by Brilliant Staff
Using the distributive rule, which of these are equivalent to \( 7 \times 64 + 7 \times 6? \)
Excel in math and science
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Our wiki is made for math and science
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Using the perfect square identity, which of these is equivalent to \( 81^2 ? \)
Hint: \( (a+b)^2 = (a+b) \times ( a +b) \).
Excel in math and science
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It's hard to learn from lectures and videos
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Our wiki is made for math and science
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Using the difference of two squares identity, which of these is equivalent to \( 5.7 \times 6.3 ? \)
Hint: \( a^2 - b^2 = (a+b)(a-b) \).
Excel in math and science
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It's hard to learn from lectures and videos
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Our wiki is made for math and science
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by Brilliant Staff
\[35 \times 28 = \, ? \]
(No calculators! Use your head and the hint above.)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
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Used and loved by 4 million people
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by Brilliant Staff