## Funny Questions and Unexpected Answers at Tech Job Interview

May 17, 2013 Leave a comment

Math and Logic Puzzles

February 17, 2013 Leave a comment

The question is simple. The best way to answer to the question is to give examples. Here they are:

How many cowboys are expected being alive after a gun fired in a saloon?

How many people in a block building have the same birthday as yours?

How much time do I expect to spend guessing a 5 digit password?

Does a prince have a chance to be chosen by a princess?

How much money does a casino earn everyday?

What is chance that a rocket launch will be successful?

Does a nuclear reactor explode if 4 of 100 its nuts fail?

We don’t use probability on daily basis. Sometimes, simple probabilistic calculations help us to make wise decision and avoid risk. My answer to the title’s question is YES. And yours?

December 14, 2012 1 Comment

** **

**SMS** stands for **Short Math Situation**. The SMS questions are limited to 64 characters.

31. How many diagonals does a regular octagon have? Answer

32. How many times heavier than a rabbit is an elephant? Answer

33. If you live 100 years, how many times will your heart beat? Answer

34. How many handshakes take place at a 100 men meeting? Answer

35. How many 4-digit pass codes are there? All digits are different. Answer

36. What part of the American flag is red? Answer

37. 99% of N nuts and 99% of a nut cost as much as all nuts. Find N. Answer

38. Find the smallest number divisible by all numbers from 1 to 20. Answer

39. Work out the sum of all the integers below 100. Answer

40. I buy 5 eggs for $1 and sells 1egg for $5. What’s my profit? Answer

41. How to split $4, $5, and $6 in a ratio of 1:2:3? Answer

42. What is the probability that two kittens are boys? Answer

43. What is the probability that one of 3 idiots survives in a duel? Answer

44. At least 2 Londoners have the same number of hairs. Is it true? Answer

45. Is it possible to plant 10 trees in 5 rows of 4 trees? Answer

46. How many triangles can I make with six line segments on a plane? Answer

47. Divide $1234 into the ratio 1:2:3:4. Answer

48. How much costs an item after three successive discounts of 20%? Answer

49. One of 240 coins is odd. How do you use a scale to find it? Answer

50. Tom’s income and spending are 7/8 that of Tim. Who saves more? Answer

51. How many 11-digit numbers can you make using 0, 1? Answer

52. Find the smallest integer that is 4 times the sum of its digits. Answer

53. How many 0s are at the end of the product of 2-digit integers? Answer

54. Guesstimate the number of your ancestors in 200 years. Answer

55. How many tennis balls can fit in a school bus? Answer

56. O T T F F S S What is the next letter in this series? Answer

57. Find the angle between two diagonals of a cube. Answer

58. For which capital letter would you use more paint? Answer

59. How many $1 bills are numbered from AB01234567 to AB11111111? Answer

60. What occurs once in a minute, twice in a week, once in a year? Answer

A+Click SMS Part 1 (questions 1 – 30)

A+Click SMS Part 3 (questions 61 – 90)

November 28, 2012 3 Comments

**Part 1 Comes From Ohio, USA**

found at protecher.net

“Someone on here posted a math website that had math activities for grades 1 – 12, called A+ Click.

Anyway, I passed it along to my husband, who teaches math ~ who is addicted to math. My husband got on the doggone thing ~ and stayed for weeks. It’s so like him ~ anything with computers and math has got to be good!

Sadly, there were a few “glitches” in some of the answers ~ which only a math nut like my husband would ever notice! After that, he was on that website every night, scouring for ways to tweak it. (I never got back on the thread to mention this ~ I just didn’t have the heart to put cold water on it…)

Well, each time my husband found something ~ he would politely email the creator, who came to welcome my husband’s input. This went on for several weeks ~ by now, I think my husband spent so much time on the website that he’s seen every problem ever invented! So, today, I guess my husband found, in his school mailbox, a letter from the creator (who lives in Europe) thanking him so nicely ~ and a big, glossy book on Switzerland, with gorgeous picture after gorgeous picture in it!!! Wow!

Strangers reaching out to one another, across great distances, just because of common interests in learning and helping other learners ~ kind mutual exchanges like this give me hope for a better world!”

**Part 2 Comes From Lausanne Switzerland**

The site founder wrote:

“When I was a young boy, I studied mathematics in school and also on my own using Martin Gardner’s puzzles books. I often walked several miles to the city library in chilly Siberian frost to read just a few of the puzzle books’ pages. Very soon, I missed compelling challenges.

Now, as an adult, I am eager to help children throughout the world who are in the same position that I was in as a child to discover interesting, practical, and challenging math and logic puzzles and answers. We created a collection of more than 7000 compelling problems at www.aplusclick.org. These problems are illustrated, short, simple, and interesting for all ages. No sign up, no fees, and no advertising. Everybody can participate in a continuous online international competition.

Dozens of people worldwide have helped us develop this library of math problems. They thoroughly reviewed the problems and helped to make them simple and clear. The volunteers are acknowledged at the A+click site.

Every day, thousands of children spend a great deal of time and effort mastering their logical reasoning and mathematical thinking at Aplusclick .

We thank all of our users and contributors for such a marvelous initiative to help children grow intellectually and become problems solvers.”