How many blood types are there?
66629
What are the blood groups for human beings?
27090
Do humans have enough biological differences to be grouped into races or subspecies?
85658
Number of onto functions
117726
Why can blood group O be given to all blood groups?
933
How many groups exist with order $n$ (two isomorphic groups are treated as the same group)
16687
Number of Equivalence relations of $\{1,2,3\}$
52348
Counting the number of surjections.
142016
one to one distinct restriction on selection
73766
Do bonuses of the same type stack?
65023
Number of genes required to sustain life
114758
Why are certain aneuploidies more common?
153766
Are there viruses that affect cells across different species?
152370
Type of a double
62518
How many rectangles or triangles.
29946
Do Squibs have to be pure-blood?
122839
how many different equivalence relations
35362
Number of equivalence relations on a set