Braingle Lite



A Long Time

Category:Series
Submitted By:dutchymonster
Fun:*** (2.27)
Difficulty:**** (3.12)



Which 2 letters come next in this series?

C, O, S, D, C, P, T, J, C, _, _

Answer:

T & Q

These are the initials of the periods from Cambrian (100,000,000 yrs ago) to Quaternary (present):

Cambrian,
Ordovician,
Silurian,
Devonian,
Carboniferous,
Permian,
Triassic,
Jurassic,
Cretaceous,
Tertiary,
Quaternary

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