The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

If your uncle’s sister is not your aunt, what relation is she to you?

Which tank will fill first?

What is so fragile that saying its name breaks it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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?

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?

What is the next shape from answers A, B, C, and D figure?

What breaks yet never falls, and what falls yet never breaks?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C