Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

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

AB * C = DE - F = GH / I

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?