School-Safe Puzzle Games

Recent Comments

  1. Square of the Primes

    Pavlen | Profile

    Why 11 digits? I tried 11 digit binaries, as decimals but could not find yet. Not easy to reverse numbers even in Excel. I could reverse, but have problems to copy then.


  2. Square of the Primes

    suineg | PUZZLE MASTER | Profile

    Jaja, cool I thought it was an eleven digit prime…. thats why I gave up quickly man, the primes doubled squared gives you a 41 to 43 digit number jajajajaja, but cool man.


  3. Square of the Primes

    Shawn | PUZZLE GRANDMASTER | Profile

    Yes! Those were the two solutions at which I arrived. I was hoping to find an answer that was not palindromic, which would have been much more interesting, but I reached the limits of Excel without finding such an animal.


    This little trick will work with any number of the form “100…001″ but, other than 101, no other such numbers are prime (at least not within the limits of my power to discover them).


    @Bobo the header image is a oblique nudge toward finding the first answer, 11, and recognizing the doublesquare=palindrome requirement. Plus, it was easy to find on an image search, and the color matches the webpage, so I guess you could call it destiny!


  4. Simple puzzle will confuse all but the accountants

    Scholar gypsy | Profile

    Hv no idea..what would be the answer is?


  5. Square of the Primes

    DanWebb | Profile

    Very difficult problem. How do I see the comments?


  6. Square of the Primes

    Hex | PUZZLE MASTER | Profile

    Possible starting numbers: 11 and 101
    11^2^2 = 14641
    Reverse digits: 14641 -> 14641
    sqrt(sqrt(14641)) = 11


    101^2^2 = 104060401
    Reverse digits: 104060401 -> 104060401
    sqrt(sqrt(104060401)) = 101


  7. Square of the Primes

    Bobo The Bear | PUZZLE MASTER | Profile

    My first response (after about 30 minutes effort) is that only A=11 and A=101 will work. In both cases, A^4 is palindromic, meaning the final prime number is A itself. Cannot yet prove this. (BTW: I am going on the assumption that the picture is not meant to imply that A is an 11-digit prime. Although I am curious as to why that image was chosen.)


  8. Sum of Primes

    Square of the Primes | Smart-Kit Puzzles and Games | Guest

    [...] Sum of Primes! « Best of Casual Puzzle Games [...]


  9. Seeing stars

    dezcifrando | Profile

    3 black stars – all lines and columns must have 4 white stars and 5 black stars


  10. A Glorious Game

    dezcifrando | Profile

    My answer is 5 players. Using the Venn diagram, you can easily figure it out. I agree with @suineg. You have to have in your mind that players can sound and also break both of their arms. You will need to make 3 Venn diagrams


  11. French Hidden Object Card

    Spotter | Profile

    clouds signify the roosters body


  12. Hidden Object-Find the Druid

    Spotter | Profile

    ahh hidden in the stone to the left quite an easy one upisde down


  13. Hidden Object-Find the Druid

    Spotter | Profile

    ahh hidden in the stone to the left quite and easy one


  14. Where is the Astronomer?

    Spotter | Profile

    between the globe and the curtain to the left


  15. Hidden Forms

    Spotter | Profile

    a man looking down a a small (boy/girl) in his arms


  16. Hidden Object Card- 2 Artists

    Spotter | Profile

    1. upside down on the painting (smaller) 2. Between the painter and the boy looking at painting from aside


  17. ‘Cover the Spot’-the carnival puzzle game.

    my2livers | Profile

    I lost a about $15 or $20 years ago on this one. I figured “I’m a mathematician so I can do this.” Whenever I placed the 2nd and 3rd circles in the correct spots, the Carnie claimed to ‘help’ me by moving them up slightly. I was so young and trusting (and stoned) that I failed 2 realize what he was doing. Geez… As my dad used to tell me, “For someone so smart U sure act stupid!” Now that I’m older and wiser and don’t have to bet any money, I’m looking 4ward to trying this game. Hope it’s still avail. cheers.


  18. School Bus Puzzle

    my2livers | Profile

    I see that a lot of us are pretty defensive when faced w/ the possibility that children are more observant than we! haha. Glad I’m not alone. Props 2 the kids! xD


  19. School Bus Puzzle

    my2livers | Profile

    It’s not moving at all! It’s standing still in the middle of my screen. Good thinking by the kids, but where’s the windshield? I don’t think this bus is going anywhere….