Solution:

Since every bacterium divides into two in two minutes and we know the fact that the dish was half filled with bacteria at 3 pm, after exactly 2 minutes, all will divide into two and will fill the petri dish. Thus, the petri dish will become full at 3:02 pm.

Solution:

Kid1, he was left with one rock.

Solution:

2 minutes (duration between 9:59 and 10:01)

Solution:

1/36

Explanation:
The number of possibilities for the first as well as the second dice are 6 and 6 respectively. Therefore the total possibilities or outcome are 6 * 6 = 36.
Out of 36 outcomes, we need only one case i.e. the first gives 2 and the second gives 5.
Therefore, the probability will be 1 on 36 or 1/36.

Solution:

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

Solution:

On Your lap.

Solution:

The password is U472BMT.

Read aloud the line and you will sound something like "U Four Seven 2 B M T".

Solution:

28 =>1+2+4+7+14

cannot be 1 (as number cannot be included)

Solution:

Six.

There are only five colors, so six socks guarantee that two will be the same color.

Solution:

See the colored sticks in the picture. We have moved those sticks in the position given in the second image corresponding with the color.

Solution:

NONE, holes are empty.