Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Count the number of triangles in the given picture.

How can you leave a room with two legs and return with six legs?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

What breaks yet never falls, and what falls yet never breaks?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

How many bananas can you eat if your stomach is empty?

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