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--- fuss:mathematics [2020/04/22 17:02] – office
+++ fuss:mathematics [2025/10/21 23:26] (current) – external edit 127.0.0.1
@@ Line 26: / Line 26: @@
 | math blackboard bold (calligraphic) | used mostly for sets | ''<nowiki>\mathbb</nowiki>'' |
+====== Divisibility ======
+  * by $2$, last digit in a number is divisible by $2$,
+  * by $3$, the result of all digits summed up in a number is divisible by $3$,
+  * by $4$, last two digits in a number form a smaller number that has to be divisible by $4$,
+  * by $5$, last digit divisible by $5$,
+  * by $10$, number ends in $0$
 ====== Index ======
 {{indexmenu>fuss:mathematics}}