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

If an electric train is travelling south, then which way is the smoke going?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Replace The Question Mark Below With the Correct Number.

2 {38} 3
4 {1524} 5
6 {3548} 7
8 {????} 9

Complete the table series riddle by finding the number that can replace "??".

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

I am an odd number. Take away a letter and I become even. What number am I?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _