Can you find out which number multiplied by itself will give the output as 12345678987654321?

What Deficiency does the below rebus represent?

VIT_MIN

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I make two people out of one. What am I?

If you say my name, I will no longer exist. What am I?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

What number should come in place of the question mark below?