# Complete the sequence: ST, ND, RD, ??, ??

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Complete the sequence: ST, ND, RD, ??, ??
posted Apr 14, 2017

The Sequence is---- 1(ST),2(ND),3(RD),4(TH),5(TH),6(TH) and so on...

Answer is ST, ND, RD, "TH,TH".
The logic behind is: Displayed the series of Ordinal number suffixes.
Ordinal number series of {1,2,3,4,5} is {First, Second, Third, Fourth, Fifth }
{First, Second, Third, Fourth, Fifth } equals { 1st,2nd,3rd,4th,5th}
Suffixes of {1st,2nd,3rd,4th,5th} is {st,nd,rd,th,th}

Solution:

TH

Explanation:
1st 2nd 3rd 4th 5th etc..

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