What has no start, end, or centre?

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.

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Which word does the below Plexor means ?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

I have eight fingers and two thumbs but I do not live. What Am I?