Solution:

The Hundred Years war lasted 116 years from 1337 to 1453.

Solution:

Either your read from start or from ends, it will be same

Solution:

It can be done in 8 moves as shown in the animated image below.

Solution:

zero

I had 3 green socks and 1 Pink sock.

=> chances of pair of green socks = 1/2
chances of pair of mixed socks = 1/2
chances of pair of green socks = NULL

Solution:

To do it, the marbles must be arranged as the vertices of an octahedron. If you are unsure, check the image below.

Solution:

A Spider

Solution:

The three errors are as follows:
a) fynd is spelled wrong. The correct spelling is 'find'.
b) that is not appropriate to use here. It should be 'this'.
c) There are only two errors in the question and that is the third error because the questions asks us to find three.

Solution:

It can be done as shown in the picture below.

Solution:

'five'

Its the count of alphabet

Solution:

The Password.

Explanation:
Clues 2 and 5 are correct and rest are lies.

Solution:

74658

* 8 + 6 =14
* 5 - 4 = 1
* 7 = 2*4 - 1
* 4 + 6 = 10
* 7+4+6+5+8 = 30