Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

I am the fastest animal but cannot climb the tree. What am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you place three balls such that the equation shown in the picture holds true?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?