Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

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 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Replace each alphabet with the number (1-9) to make the below equation correct.

AB * C = DE - F = GH / I

What is more useful when it is broken?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

By using 'because' continuously three times, can you make an English statement ?

Which is the correct shadow of the bird?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?