Odd one out

Which is the odd one out:

1. Nigeria, Norway, Laos, Liberia
2. teach, sing, bring, preach
3. 10, 33, 21, 55

norway
bring
10

im probably wrong, but i felt like trying for a sec

Originally posted by opsoccergurl11
norway
bring
10

im probably wrong, but i felt like trying for a sec

Originally posted by Acolyte
Which is the odd one out:

1. Nigeria, Norway, Laos, Liberia
2. teach, sing, bring, preach
3. 10, 33, 21, 55

The last one could be 33 as it's not a triangular number like 10, 21 and 55.

Originally posted by royalchicken
The last one could be 33 as it's not a triangular number like 10, 21 and 55.

can anyone give some reasoning for their answers?

laos b/c for all i know its the only one not in africa
bring b/c the others all have to do w/ saying sumthin
10 b/c its the only one w/o a factor of 2


and yes, i do know my answers are wrong

I think this demonstrates the difficulty of setting 'odd one out' puzzles. opsoccergurl11 is right about question 2 (though I had another answer in mind) RC and piderman are both right about question 3.

Re number 1
As "teach, sing, bring, seek" the odd one out is "teach" because its the only word that doesn't make a new word if you add "s" to the end.

If left as "teach, sing, bring, preach" the odd one out is "bring", because its the only word that is not an occupation if you add "er" to the end.