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First of all, you'd never reach grandmas. Moving on from the obvious... 2 pies, get to a bridge, give 1, get it back, now you have 2, keep it going for infinite number of bridges, same solution, but …

WITHOUT BRACKETS Without the use of brackets you can make the following numbers: -37 -36 -29 -28 -23 -22 4 6 8 23 24 29 30 36 37 38 40 41 46 47 All positive integers are: 4 6 8 23 24 29 30 …

The following are tricks with numbers that you must explain how they work. Trick #1 Think of a number between 1 and 9 Multiply by 9 Add up all of the digits of this number Divide by 3 Subtract 2 …

N is a number where each digit is divisible by its place, for example: 1527 1 has to be divisible by 1, 5 divisible by 2, 2 divisible by 3, and 7 divisible by 4. Additionally, N must be divisib …

How many possibilities are there for $n$ and $m$ when given this equation? $n^m$ = $m^n$ How many possibilities are there when dealing with positive integers? What about any integers? Or fractions a …

This question was inspired by a recent question about number persistence. If a number's persistence is defined by how many times you have to multiply all of its digits together before you get a singl …

If I give you one of each letter in the alphabet what's the largest you can spell (in word form)? Bonus: What's the smallest? Bonus 2: What if you can use the words "minus", "plus" and "times"?

You get get 6 attempts to find the number between 1-100. Each "attempt" can either be a guess, or a range it could fall in, responses you could receive are "Correct!", "My number is lower.", "My numbe …

You may use math signs you wish, but you must use the numbers 7,3,7,3 in an equation so it equals 24 Is it possible? If so, show how. No-nos: You are not allowed to combine numbers to m …

Runs to the nearest store, buys a scale. Cut the piece of paper in a perfect half, weigh each half, it's a now perfectly balanced equation! +1 for originality?

Well, the florist is in between so, since it's 800 meters away, I'd say that the total distance from house and hospital is 1600 meters. So the florist is about 800 meters from her house. So that don't …

In an alternative universe where the following is true: 1 # 1 = 3 2 # 2 = 7 1 # 2 = 5 What would ? be? 5 # 5 = ? YOU DO NOT NEED THE FOLLOWING TO FINISH. Extra equations:

(Don't worry, this is the last magic square themes question I'll be posting (as far as I know), so I picked a challenging one!) First off, let's define what a magic square is; A magic square is a …

On Halloween night, a young boy was trick-or-treating. It was late at night and he was on his last stop. He knocked at the door and said: Trick-or-Treat! The man inside said he had a bag of just …

This is just math... The numbers each represent a person. When we move on to person 2, he does not shake 11 times. He'll shake 10, due to already shaking with 1 earlier. This will repeat, which mak …