Solution:

The rabbit is present in the left tusk of the elephant.

Solution:

The number missing on the left is 8 and the one on right is 7.

Explanation:
The pattern:
The number in the center of triangle is the square root of the sum of the numbers sitting outside on the corners.

Thus,
10 + 22 + 4 = 36
Square Root of 36 = 6

In the same manner:

10 + 42 + 12 = 64
Square Root of 64 = 8

12 + 22 + 15 = 49
Square Root of 49 = 7

Solution:

It can be achieved as it is shown in the figure.

Solution:

30 squares.

Explanation:
Assuming smallest square side is 1 meters, then

Total number of squares with side 1 meters are 16
Total number of squares with side 2 meters are 9
Total number of squares with side 3 meters are 4
Total number of squares with side 4 meters is 1

summing 16+9+4+1 = 30

Solution:

The correct choice will be the option 'd'.

In each succeeding row, the previous column is reversed and the lowest digits are omitted.

Solution:

We have provided you with one of the possible solutions. However, there can be three more solutions to this problem.

Solution:

The missing letter on left is P and the missing letter on the right is C. The word starts from the missing letter C and forms the word champion.

Solution:

The figure shows how we have done it. If you have any other idea in mind, feel free to comment below.

Solution:

In the picture you can see which matchsticks we have moved.

Solution:

You can see how we did that in the given picture. The idea is to covert the boundaries first and then move to inner squares. If you have another solution, you can send us that or comment with it below.