Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Can you place six X (crosses) in below board without making three in a row in any way ?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

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?

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?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

Which famous Hollywood movie name is hidden in the below rebus?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?