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A mathematical puzzle whose solution is heavily based on the arithmetic properties of the integers. Use with [mathematics]
3
votes
First digit of 2020!
Because:
8
votes
Professor Halfbrain and the number cycles
It is:
For example:
0
votes
Finni's tricky game
I think B picks:
Why?
33
votes
Make 0 0 0 0 = 8
It's different:
5
votes
Make 6 5 4 3 = 1
I'm going to try:
and:
18
votes
Make 5 5 5 5 = 19
My way:
and
New, and added for it's simplicity:
5
votes
Arrange numbers to 3x3 square with concentric (Addition and Difference)
Difference 1
Reasoning:
Difference 2
Reasoning:
Addition
Reasoning:
0
votes
The pre-alpha calculator
Any number of the form $d_1\dots d_k\pm e_1\dots e_l$ where each $d_i,e_i$ are distinct.
For example $75463-1092=74371$.
Similarly, replace the $\pm$ with $\times$ for more results.