Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

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

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Can you quickly find which two matchstick figures are identical?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

What is the last thing you take off before bed?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=