Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

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

ST ND RD TH '?'

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

Why are televisions attracted to people?

what does this picture(rebus) riddle means ?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?