Multiply 37 by any number divisible by 3 and get a triple digit or a mirror number in the case of 33
37x3 = 111
37x6 = 222
37x9 = 333
37x12 = 444
37x15 = 555
37x18 = 666
37x21 = 777
37x24 = 888
37x27 = 999
37x30 = 1110
37x33 = 1221
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Back to the OP
Three makes triangles, four makes squares.
3+4=7
3+7=10 1+0=1
4+7=11 1+1=2
I imagine the discovery of numbers to the ancient civilization must have been mind blowing. My approach is to feel like I'm discovering numbers for the first time. I try to stay objective and see the numbers as numbers first, I'll let others add the significants. Personally 37 has some significants, and Rex just blew me away.