Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Why do people go to bed?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Find the next number in the sequence

5 12 24 36 ?

What does this rebus mean?

O
N
C
E
TIME