Answer:
I can be found in seconds, minutes and centuries, but not in days, years or decades.
What sphinxes employ and players enjoy.
What you do to determine the length of something
Bobby likes Jimmy but not Joe, apples but not pears, jeeps but not vans, shinny but not hockey, tennis but not squash. Who will he like, Sara or Sally?
There is 10 birds on a branch, a man shot 5 of them. How many were left?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?