Replace the question mark with the correct number in the below-given picture?

Which English verb becomes past tense just by rearranging the letters?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

Which tank will fill first?