I have teeth but i don't bite. Who Am I ?

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?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

The centre of the third figure is empty. What digit should fit inside?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

Can you count the number of triangles in the picture below?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

What word begins and ends with an E, but has only one letter?

Which word does the below Plexor means ?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?