Each one of them.
15: the only semi-prime in the list
2: the only even prime in the list
8: the only perfect cube in the list
13: the only odd prime in the list
16: the only perfect square in the list.
Take your pick!
You could make a case for any of them.
If the series is plus one, times two, plus one, times two, etc., the 8 does not belong.
You have to find a pattern in the numbers, and exclude the one that messes up the pattern.
One trillion
19
30
You could make a case for any of them.
8
The answer is 12 every other numbers are odd numbers, but 12 is an even number
9 - all the rest are prime
N, because it is not in the first half of the alphabet.
The answer is KThe letter should be L
Most probably 48.
133 ,because all haveroot squares except 133
It could be any one of them. 5: The smallest prime number with a composite on either side. 2: The only even prime number. 8: The only perfect cube number. 13: The only 2-digit prime. 16: The only perfect square number.
If the series is plus one, times two, plus one, times two, etc., the 8 does not belong.
You have to find a pattern in the numbers, and exclude the one that messes up the pattern.