Which of the below owl is odd one out?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

You can hear me, but you can't touch or see me.

What am I?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Can you move 2 matchsticks to form four equal sized squares.