There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Why are all black people so quick ?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What does this mean?

CCCCCCC

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Can you find a five letter word that is left with only two letters if one is removed?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Spot 5 differences in two Christmas tree below: