There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

What has hands, but can’t clap?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

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

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?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?