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Incorrect

Explanation

Each clock is set to 4:20.

Solve this puzzle

How many times does the letter ‘a’ appear from 0-100?

Zero 4 10 20

Prehistoric Mathematics

Here is our first article devoted to the history of mathematics. The article contains the analysis of the development of the numeral system in the prehistoric era and four main stages of the “number” concept evolution.

MathAndMind is an online math game where you get an opportunity to solve 10 math tasks every day. Every correct
answer earns you 1 point. Your goal is to score as many points as
possible and become a Math champion!
Remember, though: you can’t use a calculator while playing! We’re waiting for your visit!

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