1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

How many triangles are there in the picture below?

Can you count the number of rectangles on a chessboard?

Can you find out the missing number in the grid?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

Which is the correct shadow of the bird?

Whats the next number in the below number sequence pattern.