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  1. lateral thinking - When does 1+1=3? - Puzzling Stack Exchange

    Nov 28, 2014 · 4 1+1=3 When the one who calculated it doesn't know maths or not good in maths (probably a small child or someone who doesn't learned mathematics properly)

  2. 1 2 3 4 5 6 7 8 9 = 100 - Puzzling Stack Exchange

    Apr 14, 2015 · The sequence of numbers $1\ 2\ 3\ 4\ 5\ 6\ 7\ 8\ 9$ has the property that you can insert mathematical operators in between the numbers from $1$ to $9$ and make the ...

  3. What's the fewest weights you need to balance any weight from 1 …

    It turns out that you need four weights, measuring 1, 3, 9, and 27 pounds. The trick here is that you can put weights on both sides of the scale. If you have an object of 2 pounds on the left …

  4. How to get 32 by using +1 , +1 , ×3 , ×3 , ÷2 , ÷2, ^2, ^2?

    Apr 23, 2020 · How to get 32 by using +1,+1,×3,×3,÷2,÷2,^2,^2? (The last two operators are 'squaring'.)

  5. Stepping Stones 1, 2, 3 - Puzzling Stack Exchange

    Oct 20, 2020 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation …

  6. How do you get 23 using the numbers 1, 2, 3 and 5?

    Nov 18, 2017 · You can only use Addition, Subtraction, Multiplication, Division. This is for a math project for my daughter. You can only use the numbers once and all numbers do not need to …

  7. mathematics - Safecracking Puzzle - Puzzling Stack Exchange

    Jun 19, 2021 · There are many answers already, but here'a a fun way to find them: we can use the combined power of Like so: This grid represents the 4D hypercube formed by the possible …

  8. mathematics - 1 2 3 4 5 6 7 8 9 = 1 - Puzzling Stack Exchange

    Apr 16, 2015 · This question inspired me to write the same puzzle but instead replace the "= 100" with "= 1" with similar requirements and restrictions. What is the expression with the fewest …

  9. Puzzle of putting numbers 1-9 in 3x3 Grid to add up to 15

    In a 3x3 grid, I'd have to put numbers from 1 to 9 in a manner so that respective row, column and diagonal add up to 15. I have only been able to come up with one solution: 6 1 8 7 5 3 2 9 4 …

  10. A very simple puzzle: 1,1,2,1,2,2,3 - Puzzling Stack Exchange

    Aug 17, 2015 · Here's a simple puzzle, I know that you will find. As long as you can count, It shouldn't take much time. 1 1 2 1 2 2 3 1 2 2 3 Find the next 4 numbers in this sequence.