A maths symbol is hidden in the below Bar Graph. Can you decipher it?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

The more of this there is, the less you see. What is it?

A pet show was happening in my locality. I went down along with my kids. In that show, I noticed that all except two of the entries were cats. All except two were dogs and all except two were Monkeys.

Can you find out how many of each animals were present in that pet show?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?