Solution:

Yes.

Solution:

Harry Potter

Explanation:
If Ron had stolen the car, he must be telling the truth, which cannot be the case since he claimed Hermione stole the car. So Ron is lying, which results Hermione did not steal the car.

Solution:

This type of puzzle is referred to as an informal fallacy puzzle. The general idea is that the logic that is presented to the user appears at first glance to be correct, but in actuality has an error in it.
Actually,
Total pound spend by elder brothers = 9+9 = 18
=>17spend on shoes + 1pound (Kylian kept for himself)

Solution:

60.

Explanation:
When you write equation in stright line, you observe consective 2's.
2 + 2 + 2 + 2 + 22 + 2 + 2 + 2 + 22 + 2 x 0 + 2 = 2 x 22 + 8 x 2 + 0 = 44 + 16 + 0 = 60.

Solution:

10.

Explanation:
Most of the people will give the answer as 6 or 3.
But the total number of holes are ten.
> 1 hole for the neck.
> 2 holes for the arms.
> 1 hole for the torso.
> 3 torn holes in the front.
> 3 torn holes in the back.

Solution:

-> Pour the water in the barrel.
-> Freeze it.
-> Pour the milk in the barrel.

Solution:

12

Solution:

As shown in the picture below, add matchstick to make 1st + symbol as 4.

Solution:

The death was ruled a suicide.

Solution:

developers=2, testers=5 and content-writters=13

Explanation:
Let the number of developers, testers, and content-writers are denoted by d, t, and c respectively.

From the given information we can write the following 2 equations;
d + t + c = 20 . . . . . . (1)
3d + 1.5t + 0.5c = 20 . . . . . (2)

Multiplying equation (2) by 2 we get;
6d + 3t + c = 40 . . . . . (2)

equation3 - equation 1
5d + 2t = 20

The unique solution with whole numbers is d = 2 & t = 5

Therefore from equation(1) we can find;
c = 13

developers=2, testers=5 and content-writters=13.