Brain Teasers Questions for Interview

Which weighs more, a gram of feathers or a gram of gold?

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Brain Teasers Questions for Interview

Look at this series carefully 30 21 29 22 28 23 27 24 26 25 Can you tell what numbers would come next in this series.

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Brain Teasers Questions for Interview

Two planes take off at the same exact moment. They are flying across the Atlantic Ocean. One leaves New York and is flying to Paris at 800 km/hr. The other leaves Paris and is flying to New York at only 750 km/hr ( because of a strong head wind ). Which one will be closer to Paris when they meet?

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Brain Teasers Questions for Interview

I didn’t count the MIG fighter planes flying in the formation, but I do remember that one MIG was in front of two MIGs, another MIG behind two MIGs and another MIG between two MIGS. How many MIGs did I see

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Brain Teasers Questions for Interview

There are 8 billiard balls, and one of them is slightly heavier, but the only way to tell was by putting it on a weighing scale against another. What’s the fewest number of times you’d have to use the scale to find the heavier ball?

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Brain Teasers Questions for Interview

A point is chosen at random from within a circular region.What is the probability that the point is closer to the center of the region than it is to the boundary of the region?

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Brain Teasers Questions for Interview

How would you pour out exactly half of the water in a completely full cylindrical pot?

tilt the cylinder 45 degrees to the horizontal till the water levels from one edge to the diagonally opposite edge.

Brain Teasers Questions for Interview

There are 3 switches in one room that control 3 electrical lamps located in the other room.You are allowed to spend 5 minutes in the room with switches,change their position as you want.Then you should go to the room with lamps and tell exactly what switch controls every lamp.You can’t return to the room with switches

This one was asked in an interview for a junior electrical engineer at intel.

Ans- you have 3 stwitches. put one switch on. wait for 1 min. switch it off. put another switch on and go into the room with the lamps. The on lamp is ofcourse controlled by the switch you turned on last. the warm but off lamp is the switch you put on first and turned off. the off and cold lamp is controlled by the switch you never touched.

Brain Teasers Questions for Interview

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?

3 Days.
First Day: 3-2=1m,
Second Day: 3-2=1m.

So, it creeped 2m at the end of the second day.
In the third day, 3 more meters it creeps to reach the peak.

Brain Teasers Questions for Interview

You have 2 candles. Every candle lights for 60 minutes. You have to find the way to measure 45 minutes

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Brain Teasers Questions for Interview

Out of 10 coins, one weighs less then the others. You have a balance scale. How can you determine which one weighs less in 3 weighs?

Divide these 10 coins into 3 stacks of 3 coins each with one coin remaining. Two weighs will estalish if any stack contains the less weighing coin as that stack will weigh less.
If all stacks weigh same then the remaining coin is least weight.
Else the less weighing stack contains the coin. Again take two coins from that stack and place each on two sides of scale. If they weigh same, remaining coin is least weight else, the one which weighs less.

you divide them in 2 staks 5 and 5 of each one
after one weigh you establish which wheigs less…there is the coin we are looking for
you take one coin out of this stack…
you divide the other 4 reamining coins in 2 stacks 2 coins each..
after a second wheigh if they whey the same then the coin you took out is the ONE…if not…
the stack wich wheigs less is the one with the coin….with other words there are only 2 coins to compair ….you do that after a third wheigh…
Obs:the third wheigh may not be necesarry

Brain Teasers Questions for Interview

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?

100 lbs

Initially the solid part is 1% of 200 lb, which is 2 lbs and all these 2 lbs stay there and becomes 2% of the total weight. So 2/2% = 100.