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

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

In the image given, you can find several triangles. Can you count them all?

Solve the following series:
AZ, GT, MN, __, YB

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

What does this below rebus puzzle mean?

What two things can you never eat for breakfast?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?