A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

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’m tall when I’m young, and I’m short when I’m old. What am I?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

The owner of a popular clothing store comes up with his own method of pricing items. A vest costs $8, socks cost $10, a tie costs $6, and a blouse costs $12. Using the owner’s method, how much would a pair of underwear cost?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?