Tie for Two:
B and C are number lines
A and D are equations
B and D show 17
B and C have hops of 1
B and D show “the answer”
A and C don’t show “the answer”

Thread for Three:
A, B, and D show 20
B, C, and D all start with 21

Fit for Four:
All four are equivalent
All four show 21