A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What is wrong in the below Picture?

What is the largest number you can write with just 3 digits?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

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

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

What can you hold in your right hand, but never in your left hand?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Find the last number in the series below:

voN luJ yaM raM ---

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?