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

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

Why is the Hole below a Lock?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

What has no start, end, or centre?

How many words can a pen with half refill write?