Can you find out which number multiplied by itself will give the output as 12345678987654321?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What four weights can be used to balance from 1 to 30 pounds?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

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?

If eleven plus two equals one, what does nine plus five equal?

Can you place three balls such that the equation shown in the picture holds true?

When 99 is considered higher than 100?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?