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Another puzzler

Discussion in 'Off-Topic' started by jmervyn, Apr 16, 2012. | Replies: 21 | Views: 1091

  1. jmervyn

    jmervyn IncGamers Member

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    Another puzzler

    I had to cheat:

    [​IMG]

    Don't give it away, guys!
  2. Bowzer

    Bowzer <a href="payments.php">IncGamers Site Pal</a><br>D

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    Re: Another puzzler

    Pre-school children > Programmers?

    I shouldn't have taken all those logic classes, when all I needed was nap time!
  3. BobCox2

    BobCox2 IncGamers Member

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    Re: Another puzzler

    I have 2 Grandkids in that age range they both failed this test.
  4. kestegs

    kestegs D3 Monk Moderator

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    It took me 2 minutes to solve this, no cheating here. Fun one!
  5. SaroDarksbane

    SaroDarksbane IncGamers Site Pal

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    Re: Another puzzler

    Same here, and thank goodness; don't want to be showed up by pre-school children. ;)



  6. krischan

    krischan Europe Trade Moderator

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    Re: Another puzzler

    Just like jmervyn, my vast intellect and incredible knowledge distracted me too much from the easy solution :smug:.

    I figured out something which is actually correct, but which didn't explain why children could solve it if they don't know numbers, so I wasn't sure enough about it to consider it as reliable.
  7. BobCox2

    BobCox2 IncGamers Member

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    Re: Another puzzler

    Yeah - you try and get them to spend 10 minutes on this..

    ...Fail...

    Just Saying
  8. jmervyn

    jmervyn IncGamers Member

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    Re: Another puzzler

    Still, it makes sense if you (don't) think about it, if you know what I mean. My son knew his Arabic numerals by that age (and was trying to learn Latin numerals, oddly enough), so I didn't make the connection.



  9. kavlor

    kavlor IncGamers Member

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    Re: Another puzzler

    Took me more than 2 minutes but less than 10.
  10. stillman

    stillman IncGamers Member

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    Re: Another puzzler

    I probably would not have got it w/o the wording.
  11. kavlor

    kavlor IncGamers Member

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    Re: Another puzzler

    You might of found the answer the way I did but there is another way and why it's children who would get it.I found the easier way by googling which I think is alright if you already figured the answer(the actual answer not the formulae).



    Last edited: Apr 17, 2012
  12. kestegs

    kestegs D3 Monk Moderator

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    Re: Another puzzler

    It gave you all the info you need to figure it out. The most important part was that you need no math skills besides basic counting (due to age that can solve it)

    Once you start thinking in that mindset it really should be pretty simple to figure out.
  13. kavlor

    kavlor IncGamers Member

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    Re: Another puzzler

    Ah makes more sense what Krischan was talking about,as in counting not basic mathematics.Its actually more logic based than mathematics if you solve it the other way(unless theres yet a 3rd way hidden in it).
  14. Technomancer

    Technomancer IncGamers Member

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    Re: Another puzzler

    HAHAHA!! I looked at that for about 10 minutes last night, and was like "whatev'!" I looked at it again now for just a couple of minutes and figured it out! That's evil!!
  15. Stevinator

    Stevinator IncGamers Member

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    Re: Another puzzler

    So is the answer 2? because i think i found a pattern that works, and its really stupid, but the comments in here make me think I got it.

    and yes, it would not have happened without the hint that kids are better. I was all off checking even / odd, prime numbers, variations of adding and subtracting etc. The 0000=4 line kept thwarting all my theories.
  16. jmervyn

    jmervyn IncGamers Member

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    Re: Another puzzler

    That's the thing; there's no doubt once you recognize that it has nothing whatsoever to do with the representation of the numbers themselves.



  17. Shadowtwin

    Shadowtwin IncGamers Site Pal

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    Re: Another puzzler

    Well, I also got the right answer in about 5 minutes. Then I googled the answer and found that I got to it the wrong way. That said, if it takes a programmer an hour to get it as a straight logic problem they are probably in the wrong line of work.
  18. jmervyn

    jmervyn IncGamers Member

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    Re: Another puzzler

    Well, pattern recognition is a very useful characteristic in a programmer, but I don't believe it is essential. It's like mathematics; I wasn't a great programmer because I have poor simple math skills, yet my pattern recognition and linguistic skills are top notch.

    Before anyone asks, I cheated per my OP because I was lazy and curious; I didn't really try to solve it. I love "bar puzzles" too...



  19. kavlor

    kavlor IncGamers Member

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    Re: Another puzzler

    I think it's more that if it was worded in a more truthful way the clue wouldn't of worked,obviously it didn't work on some of us anyway.

    I think that I like doing logic problems made me do it the way I did but I don't particularly like solving riddles.
  20. BobCox2

    BobCox2 IncGamers Member

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    Re: Another puzzler

    Try this:
    http://projecteuler.net/
    [TABLE="class: grid"]
    ID Description / Title Solved By
    1
    Add all the natural numbers below one thousand that are multiples of 3 or 5.
    210251​
    2
    By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
    173808​
    3
    Find the largest prime factor of a composite number.
    126456​
    4
    Find the largest palindrome made from the product of two 3-digit numbers.
    116550​
    5
    What is the smallest number divisible by each of the numbers 1 to 20?
    129898​
    6
    What is the difference between the sum of the squares and the square of the sums?
    131550​
    7
    Find the 10001st prime.
    111186​
    8
    Discover the largest product of five consecutive digits in the 1000-digit number.
    98318​
    9
    Find the only Pythagorean triplet, {a, b, c}, for which a + b + c = 1000.
    98385​
    10
    Calculate the sum of all the primes below two million.
    89490​
    11
    What is the greatest product of four adjacent numbers on the same straight line in the 20 by 20 grid?
    67765​
    12
    What is the value of the first triangle number to have over five hundred divisors?
    59889​
    13
    Find the first ten digits of the sum of one-hundred 50-digit numbers.
    66492​
    14
    Find the longest sequence using a starting number under one million.
    64463​
    15
    Starting in the top left corner in a 20 by 20 grid, how many routes are there to the bottom right corner?
    52995​
    16
    What is the sum of the digits of the number 2[SUP]1000[/SUP]?
    70449​
    17
    How many letters would be needed to write all the numbers in words from 1 to 1000?
    44446​
    18
    Find the maximum sum travelling from the top of the triangle to the base.
    44899​
    19
    How many Sundays fell on the first of the month during the twentieth century?
    40933​
    20
    Find the sum of digits in 100!
    67286​
    21
    Evaluate the sum of all amicable pairs under 10000.
    44492​
    22
    What is the total of all the name scores in the file of first names?
    41683​
    23
    Find the sum of all the positive integers which cannot be written as the sum of two abundant numbers.
    30380​
    24
    What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9?
    36452​
    25
    What is the first term in the Fibonacci sequence to contain 1000 digits?
    49999​
    26
    Find the value of d < 1000 for which 1/d contains the longest recurring cycle.
    25396​
    27
    Find a quadratic formula that produces the maximum number of primes for consecutive values of n.
    26891​
    28
    What is the sum of both diagonals in a 1001 by 1001 spiral?
    38501​
    29
    How many distinct terms are in the sequence generated by a[SUP]b[/SUP] for 2 ≤ a ≤ 100 and 2 ≤ b ≤ 100?
    33019​
    30
    Find the sum of all the numbers that can be written as the sum of fifth powers of their digits.
    35635​
    31
    Investigating combinations of English currency denominations.
    24769​
    32
    Find the sum of all numbers that can be written as pandigital products.
    21689​
    33
    Discover all the fractions with an unorthodox cancelling method.
    23200​
    34
    Find the sum of all numbers which are equal to the sum of the factorial of their digits.
    31390​
    35
    How many circular primes are there below one million?
    28611​
    36
    Find the sum of all numbers less than one million, which are palindromic in base 10 and base 2.
    31263​
    37
    Find the sum of all eleven primes that are both truncatable from left to right and right to left.
    23734​
    38
    What is the largest 1 to 9 pandigital that can be formed by multiplying a fixed number by 1, 2, 3, ... ?
    19890​
    39
    If p is the perimeter of a right angle triangle, {a, b, c}, which value, for p ≤ 1000, has the most solutions?
    23393​
    40
    Finding the n[SUP]th[/SUP] digit of the fractional part of the irrational number.
    26760​
    41
    What is the largest n-digit pandigital prime that exists?
    21957​
    42
    How many triangle words does the list of common English words contain?
    26206​
    43
    Find the sum of all pandigital numbers with an unusual sub-string divisibility property.
    17917​
    44
    Find the smallest pair of pentagonal numbers whose sum and difference is pentagonal.
    17348​
    45
    After 40755, what is the next triangle number that is also pentagonal and hexagonal?
    25004​
    46
    What is the smallest odd composite that cannot be written as the sum of a prime and twice a square?
    18249​
    47
    Find the first four consecutive integers to have four distinct primes factors.
    18236​
    48
    Find the last ten digits of 1[SUP]1[/SUP] + 2[SUP]2[/SUP] + ... + 1000[SUP]1000[/SUP].
    43762​
    49
    Find arithmetic sequences, made of prime terms, whose four digits are permutations of each other.
    17591​
    50
    Which prime, below one-million, can be written as the sum of the most consecutive primes?
    19060​
    [/TABLE]

    Pre-schoolers

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