Age puzzle

The average age of 10 members of a committee is the same
as it was 4 years ago, because an old member has been
replaced by a young member. Find how much younger is
he new member ?

Microsofts Interview Question

There is a table on which a number of coins are placed. You also
know that there are as many coins with Head up as many coins with
Tail up. Now you have to divide the coins (number of coins is even)
into two equal piles such that number of coins with Heads up and
Tails up in either piles be the same. The catch is you are
blind folded and you cannot determine the sides (for sure)
if you are blinded

Optical Illusions

Calender Problem

Syam showed up for work on Monday only to discover that
his delivery truck was in the shop for maintenance. He
was told it would be ready two days after the day before
the day after tomorrow. On what day can Syam expect the
truck to be back on the road?

Rectangular Cake Puzzle

How do you cut a rectangular cake into
two equal pieces when someone has already
removed a rectangular piece from it?
The removed piece can be of any size
or orientation. You are allowed just one
straight cut.

Logic Puzzles

You've been asked to buy 100 squeegies, using 100
dollars to do so. You may buy no more or less than
100 squeegies, and the total price must be exactly
100 dollars. There is no sales tax. Red squeegies
cost $6.00. Yellow squeegies cost $3.00. Blue
squeegies cost $0.10. How many of each must you buy?

Microsoft's Puzzles

How many points are there on the globe
where, by walking one mile south, one
mile east, and one mile north,you reach
the place where you started?