Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

What is at the end of a rainbow?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209