What occurs twice in a week, once in a year but never in a day?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

What's the only room from which no one can enter or leave

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

If a wheel has 54 spokes, how many spaces are there between the spokes?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?