Puzzles Odd One Out Test Questions

1. Which number is the odd one out?
 
Answer
Ans = 5243.
In the others the middle number is half of the number formed by the first and last digits, eg 3186 (36/2 = 18).
2. Which is the odd one out?
  What is the next number?
Answer
Ans = E.
What is the next number?
123456789101112131415


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