Solution:

Its explained in the picture and video

Solution:

Look into the picture.

Solution:

1. Check the list on the tree, It's a list of 6 people.
2. A spider has woven a web near the tent. This means they must have been staying for a few days at least.
3. Two men are having lunch.
The third one is measuring the depth of the river.
The fourth one is fishing.

Solution:

1. The Woman in the portrait is missing a shoe.
2. It can't be sunset at 12 PM.
3. The boy with the guitar has different sleeves.

Solution:

According to the clock, sunset is impossible at this hour.

Solution:

It can be done as shown in the picture below.

Solution:

Look at the marked lady and look at her feet. She has two left feet.

Solution:

The lady on the far right has the same mark on her upper arm as the two boys, and she also has two ice cream cones.

Solution:

He should shoot at the ground.

If Kangwa shoots the ground, it is Rafael's turn. Rafael would rather shoot at Ferdinand than Kangwa, because he is better.
If Rafael kills Ferdinand, it is just Kangwa and Rafael left, giving Kangwa a fair chance of winning.
If Rafael does not kill Ferdinand, it is Ferdinand's turn. He would rather shoot at Rafael and will definitely kill him. Even though it is now Kangwa against Ferdinand, Kangwa has a better chance of winning than before.

Solution:

No

Explanation:
7 is the only prime followed by a cube.
Assume that n3-1 is a prime for some n.
N3-1 will be equal to (n−1)(n2+n+1)
Now, n-1 divides n3-1.
If n-1>1, then we will have a contradiction to n3-1 being a prime.