This short work brings 21 main representations of 2021 in different ways. These representations are of **crazy-type, running numbers, single digit, single letter, Triangular, Fibonacci, palindromic-type, prime numbers, embedded, repeated digits, colored patterns, magic squares**, etc.

For download this work please go to following link:

- Inder J. Taneja, 21 Mathematical Highlights for 2021,
**Zenodo**, December 26, 2020, pp. 1-75, http://doi.org/10.5281/zenodo.4394408

This work appeared in well-known international newpaper “The Guardian”. See the links below:

- Can you solve it? The count reaches ‘twenty, twenty-one’, https://www.theguardian.com/science/2020/dec/28/can-you-solve-it-the-count-reaches-twenty-twenty-one
- Did you solve it? The count reaches ‘twenty, twenty-one’, https://www.theguardian.com/science/2020/dec/28/did-you-solve-it-the-count-reaches-twenty-twenty-one

The whole the work is divided in 21 section. All the sections given expressions for 2021 in different ways. See below summary of these sections:

Wonderful! Happy New Year 2021 proffesor Taneja!

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