Solution:

bear

Solution:

The brain teaser can be solved as shown in the image below.

Solution:

Move and then pour all juice from second glass to fifth glass.

Solution:

The matchsticks that are marked with red are to be removed and the final figure will have just two squares. You can remove either pair from the possible four ways.

Solution:

At 01:05

Solution:

There are 3 fruits (1 grapes, 1 apples, and 1 oranges).

Solution:

They are matched as shown in the picture below.

Solution:

4

No Of circles in the number.

Solution:

The bridge won't break.

When the car has travelled half of the bridge, that is 15km, the car must have used more than 300 grams of fuel. Therefore, the impact of bird's added weight will be zero literally.

Solution:

31

Explanation:
Ramanujan lighting the candles in binary.
11110 =30
11111 =31

Solution:

13 + 11 + 6 = 30

Explanation
The trick is that you just need to rotate '9' to form '6'.