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UNEXPECTED
ANSWERS
@ TECH-JOB INTERVIEWS-
© Igor Kokcharov
How to find a car on a street if
you don’t remmember the place?
Gountilltheendandgoback
ifyouarenotlucky.
1 © Igor Kokcharov
How many times heavier than
a baby is an adult?
20times2 © Igor Kokcharov
What is the probability that at
least two Londeners have the
same number of hairs?
Theprobabilityis1.3 © Igor Kokcharov
How much does 100 cost
if 1 costs $10 and
20 costs $20?
$304 © Igor Kokcharov
What is the most important
math sign?
5 Allofthem.
© Igor Kokcharov
How many seconds are
there in a year?
126 © Igor Kokcharov
Estimate the number of cubes in a
pyramid with a height of
300 cubes?
9,000,0007 © Igor Kokcharov
Benny Bunny starts jumping from a
hole. Every leap is twice as long
as the previous one. Does
Benny have a chance to
come back to the hole?
No8 © Igor Kokcharov
How many tennis balls can
fit in a school bus?
200,0009 © Igor Kokcharov
A $40,000 car loses 50% per year.
When does the value of the car
become less than $5?
After13years10 © Igor Kokcharov
The answers on
the challenging
questions
in the
book
© Igor Kokcharov
http://www.amazon.com/Brain-Teaser-Interview-Questions-Answers-ebook/dp/B00E43XD76
Click to look inside
Weturnabouttheverticalaxistolookback.11 © Igor Kokcharov
Why do mirrors reverse right and left
instead of up and down?
How to make it correct?
Putawaytheredtack.12 © Igor Kokcharov
12 © Igor Kokcharov
If 2 salesmen can sell three luxury cars
in 4 days, how many cars
can 5 salesmen sell to
six clients in 7 days?
Six13 © Igor Kokcharov
ACCORD14 © Igor Kokcharov
ACCESS
ACCEPT
ACCORD
ACCENT
Find the odd one out.
100000000000000000000000000000000
15 © Igor Kokcharov
What is 2 to the power of 32?
Two16 © Igor Kokcharov
How many coins must you move to
make two lines with
five coins each?
If you are redhead you have
more than the average
number of hair.
This is . .
Verylikely.17 © Igor Kokcharov
Four cowboys have a meeting. Each cowboy
has 1 bullet. Each cowboy randomly chooses
and successfully shoots
another cowboy. What is the
probability that all of them
are shot?1/918 © Igor Kokcharov
How many integer numbers
are there that are twice
the sum of its digits?
119 © Igor Kokcharov
We want to merge 4 companies into one big
company. How many ways are there to
merge? You may merge only
2 companies at once.
1820 © Igor Kokcharov
The answers on
the challenging
questions
in the
book
© Igor Kokcharov
http://www.amazon.com/Brain-Teaser-Interview-Questions-Answers-ebook/dp/B00E43XD76
Click to look inside
What is the screen width of a 15'' laptop with the
ratio of the
screen height to the
width 4 : 3 ?
12’’21 © Igor Kokcharov
I am playing Russian roulette.
I randomly spun the chamber
and fired but nothing was
fired. Would I rather fire
the gun again or respin
the chamber and
then fire?
Respin22 © Igor Kokcharov
What is the average of the largest of 9
random numbers from 0 to 1?
0.923 © Igor Kokcharov
What is the largest time that is
the same upside down?
22:2224 © Igor Kokcharov
What is the smallest number divisible
by 225 that consists of 1’s and 0?
11100001025 © Igor Kokcharov
Babylonians used a base 60 number system.
What shape inspired them to decide
that a circle has 360 degrees?
hexagon26 © Igor Kokcharov
Which direction is the London
school bus going?
Right27 © Igor Kokcharov
Divide the circles into two groups so
that the sums of the numbers of each
group are equal.
What is the sum?
21or2428 © Igor Kokcharov
How many letters are there in the word
which is always spelled wrong?
529 © Igor Kokcharov
Place the cards into two boxes so that
the probability of random drawing of
the card with letter
B is at maximum. What is the
probability?
0.7530 © Igor Kokcharov
O B B Y
B
The answers on
the challenging
questions
in the
book
© Igor Kokcharov
https://itunes.apple.com/book/job-interview-logic-puzzles/id578135550?mt=11
Click to look inside

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Unexpected Answers On Tech-Job Interview Riddles

  • 2. How to find a car on a street if you don’t remmember the place? Gountilltheendandgoback ifyouarenotlucky. 1 © Igor Kokcharov
  • 3. How many times heavier than a baby is an adult? 20times2 © Igor Kokcharov
  • 4. What is the probability that at least two Londeners have the same number of hairs? Theprobabilityis1.3 © Igor Kokcharov
  • 5. How much does 100 cost if 1 costs $10 and 20 costs $20? $304 © Igor Kokcharov
  • 6. What is the most important math sign? 5 Allofthem. © Igor Kokcharov
  • 7. How many seconds are there in a year? 126 © Igor Kokcharov
  • 8. Estimate the number of cubes in a pyramid with a height of 300 cubes? 9,000,0007 © Igor Kokcharov
  • 9. Benny Bunny starts jumping from a hole. Every leap is twice as long as the previous one. Does Benny have a chance to come back to the hole? No8 © Igor Kokcharov
  • 10. How many tennis balls can fit in a school bus? 200,0009 © Igor Kokcharov
  • 11. A $40,000 car loses 50% per year. When does the value of the car become less than $5? After13years10 © Igor Kokcharov
  • 12. The answers on the challenging questions in the book © Igor Kokcharov http://www.amazon.com/Brain-Teaser-Interview-Questions-Answers-ebook/dp/B00E43XD76 Click to look inside
  • 13. Weturnabouttheverticalaxistolookback.11 © Igor Kokcharov Why do mirrors reverse right and left instead of up and down?
  • 14. How to make it correct? Putawaytheredtack.12 © Igor Kokcharov
  • 15. 12 © Igor Kokcharov
  • 16. If 2 salesmen can sell three luxury cars in 4 days, how many cars can 5 salesmen sell to six clients in 7 days? Six13 © Igor Kokcharov
  • 17. ACCORD14 © Igor Kokcharov ACCESS ACCEPT ACCORD ACCENT Find the odd one out.
  • 18. 100000000000000000000000000000000 15 © Igor Kokcharov What is 2 to the power of 32?
  • 19. Two16 © Igor Kokcharov How many coins must you move to make two lines with five coins each?
  • 20. If you are redhead you have more than the average number of hair. This is . . Verylikely.17 © Igor Kokcharov
  • 21. Four cowboys have a meeting. Each cowboy has 1 bullet. Each cowboy randomly chooses and successfully shoots another cowboy. What is the probability that all of them are shot?1/918 © Igor Kokcharov
  • 22. How many integer numbers are there that are twice the sum of its digits? 119 © Igor Kokcharov
  • 23. We want to merge 4 companies into one big company. How many ways are there to merge? You may merge only 2 companies at once. 1820 © Igor Kokcharov The answers on the challenging questions in the book © Igor Kokcharov http://www.amazon.com/Brain-Teaser-Interview-Questions-Answers-ebook/dp/B00E43XD76 Click to look inside
  • 24. What is the screen width of a 15'' laptop with the ratio of the screen height to the width 4 : 3 ? 12’’21 © Igor Kokcharov
  • 25. I am playing Russian roulette. I randomly spun the chamber and fired but nothing was fired. Would I rather fire the gun again or respin the chamber and then fire? Respin22 © Igor Kokcharov
  • 26. What is the average of the largest of 9 random numbers from 0 to 1? 0.923 © Igor Kokcharov
  • 27. What is the largest time that is the same upside down? 22:2224 © Igor Kokcharov
  • 28. What is the smallest number divisible by 225 that consists of 1’s and 0? 11100001025 © Igor Kokcharov
  • 29. Babylonians used a base 60 number system. What shape inspired them to decide that a circle has 360 degrees? hexagon26 © Igor Kokcharov
  • 30. Which direction is the London school bus going? Right27 © Igor Kokcharov
  • 31. Divide the circles into two groups so that the sums of the numbers of each group are equal. What is the sum? 21or2428 © Igor Kokcharov
  • 32. How many letters are there in the word which is always spelled wrong? 529 © Igor Kokcharov
  • 33. Place the cards into two boxes so that the probability of random drawing of the card with letter B is at maximum. What is the probability? 0.7530 © Igor Kokcharov O B B Y B
  • 34. The answers on the challenging questions in the book © Igor Kokcharov https://itunes.apple.com/book/job-interview-logic-puzzles/id578135550?mt=11 Click to look inside

Editor's Notes

  1. The perimeter of a hexagon is exactly equal to six times the radius of the circumscribed circle. # They choose to divide the circle into 6 x 60 = 360deg;. http://mathforum.org/library/drmath/view/59075.html