Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Using eight eights and addition only, can you make 1000?

When we see 2 but call 10?

The dirtier I get, the whiter I look. Who am I?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

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?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?