Brain Teasers
A Long Long Time
Series
Series teasers are where you try to complete the sequence of a series of letters, numbers or objects.Series
Which 2 letters come next in this series?
C, O, S, D, C, P, T, J, C, _, _
C, O, S, D, C, P, T, J, C, _, _
Answer
T & QThese 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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