How many triangles are there on the puzzle below?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Through your logical capabilities, can you make 7 an even?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

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?

I have eight fingers and two thumbs but I do not live. What Am I?