You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

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

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

How can you take 2 from 5 and leave 4?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

If 1+9+8=1, what is 2+8+9?

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

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Buy me, smell me or deliver me, I do not change.

Who am I?