Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Can you replace the question mark with the correct number in the below table sequence?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

How many times in a given day, minutes and hour clock comes in a straight line ?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Which is heavier: a ton of bricks or a ton of feathers?

What makes this number unique: 8,549,176,320?