There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

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

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What has many teeth, but cannot bite?

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?

Which tank will fill first?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C