Mental Calculation, Mathematics, and Puzzles


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0 431 December 24, 2020
8 508 December 23, 2020
1 380 December 22, 2020
9 1048 December 19, 2020
26 1468 December 19, 2020
0 368 December 9, 2020
1 516 December 6, 2020
39 1302 November 30, 2020
29 2033 November 29, 2020
1 418 November 26, 2020
26 2257 November 25, 2020
6 1138 November 22, 2020
0 501 November 11, 2020
4 686 November 9, 2020
1 623 November 5, 2020
0 496 November 3, 2020
7 826 October 27, 2020
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1 581 October 24, 2020
0 551 October 24, 2020
5 680 October 14, 2020
11 1826 September 27, 2020
5 816 September 23, 2020
1 570 September 20, 2020
4 566 September 19, 2020
1 559 September 15, 2020
15 1131 September 12, 2020
3 1155 September 7, 2020
10 637 September 5, 2020
0 985 November 5, 2019