You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

If eleven plus two equals one, what does nine plus five equal?

Readers with excellent focus can find three differences between the camping scene pictures in 16 seconds. Can you? Test your eye power now!

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Readers with high attention to detail can spot the cheater in the exam hall in 5 seconds. Are you one of them? Test your visual skills now!

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

The ultimate seek-and-find challenge! Can you unearth the hidden boot amongst the sheep in our shearing salon? Put your skills to the test!

The more you take me, the more you leave me behind.
Who Am I?