What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

How can you take 2 from 5 and leave 4?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

By using 'because' continuously three times, can you make an English statement ?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?