Brain Teasers
ST, ND, RD, TH, ...
What comes next in this series?
ST, ND, RD, TH, ..., ...?
ST, ND, RD, TH, ..., ...?
Answer
TH, TH.They are the suffixes for positional numbers, eg. 1st 2nd 3rd 4th 5th 6th
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