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200lb of cucumbers was delivered to the grocery store and left in a storage room. The cucumbers contained
99% of water. After some time part of water evaporated and the contents of water in cucumbers became
98%. What is the weight of cucumbers now?
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You have 2 candles. Every candle lights for 60 minutes. You have to find
the way to measure 45 minutes.
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A snail wants to creep on to the top of the tree 5m high. During the day
it can creep up 3m but during the night it creeps down 2m. How many days does it need to reach the top?
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9 coins,one of them is fake. Use a balance to weigh them not more than
3 times and find the fake.A fake coin is not necessarily lighter.
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Connect 9 dots with 4 lines . Don't cross the same dot twice.
.
. .
.
. .
.
. .
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Parachutist is landing the island in the darkness. The island is
of unknown shape. There must be a fenced lot at the island. The parachutist
needs to find out if he is within the fenced lot or outside.
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A band is going in the street with a constant speed.Someone in the last raw has a dog.The dog runs ahead,
reaches the front line of the band and gets back to it's owner. The dog's speed was also constant all the way
and while it was running the band passed 50 feet. Find the length of the dog's path,if the distance between
the front and the rear line of the band is 50 feet.
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There are 100 gold coins in 10 columns by 10 coins in each column. Every coin weights 1 lb.
One column contains 10 fake coins.Each coin in it weights 0.9 lb.
Take one measurement to find the column with fakes.
Sent Hari R., National Semiconductor
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Two drivers are going to the next town which is 100 miles away. They depart at the same time, however
the first driver stops for gas during the first 50 miles, the second driver stops during the second half.
Each stop takes 10 minutes. They both drive with the same speed 60 mph during the first 50 miles and
65 mph during the second half. Who, do you think, arrives first?
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A chess board has 64 squares.Two squares in the diagonal corners are masked out.Is it possible
to cover the rest 62 squares with 31 dominos? (One domino covers two squares.)
Explain the logic of your answer.
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There are four numbers: 1, 2, 5, 10 that you have to carry in a boat across a river.
Every time you may not carry more than two numbers ,
and the time of traveling is associated with the largest of two numbers. One number
has to be in the boat during the return journey, which also defines the time for this trip.
What is the minimum total time to carry all numbers from one bank to another?
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A man is running across a bridge.When he is 3/8 of the way accross, he heard a train coming
behind him. If he keeps running he will reach the end of the bridge at the same time with the train.
If he turns around and runs back, he will get to the beginning of the bridge at the same time with the train.
The man runs at a speed of 5mph. What is the speed of the train?
This was sent by John Sonmez from Texas.The interviewer asked him not to use paper
but do the calculation in his head.
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We are going to play a paper-rock game (similar to paper-rock-scissors). If we both have "paper" -
I pay you $3, if we both have "rock" - I pay you $1. If they don't match - you pay me $2. Suggest a winning strategy?
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