If two's company, and three's a crowd, then whats four and five ?

In the image below, can you find the value of an angle(y)

81 x 9 = 801. What must you do to make the this equation true?

Bay of Bengal is in which state?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Replace the question mark with the correct number.

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Can you make a six-letter word using the letters N, A and B ?