Mental Math Tricks
Test your knowledge of mental math tricks — the shortcuts and patterns that let you calculate quickly without reaching for a calculator.
Questions cover multiplying by 11 and 25, squaring numbers that end in 5, the difference-of-squares trick, and techniques from Vedic mathematics.
These tricks feel like magic the first time you learn them — see how many you already know.
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Sample questions3 of 13 shown
Q1
What is the quickest mental trick to multiply a number by 11?
Q2
To quickly square a number ending in 5 (like 35²), what is the first step?
Q3
Which of the following are valid mental math tricks? (Select all that apply)
What This Quiz Covers
- Multiplying by 11 and other quick multipliers
- Squaring numbers ending in 5
- The difference-of-squares trick
- Vedic math cross-multiplication
- Using complements to 10 and 100
- Breaking numbers into easier chunks
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