118 votes

Make 0 0 0 0 = 8

A lateral thinking answer:
112 votes

3:3! It's a football score!

Does this count?
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112 votes
Accepted

Make 0 0 0 0 = 8

I think that This is because This works and is valid because
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109 votes
Accepted

3:3! It's a football score!

If you are allowed to use decimals, then
93 votes

1 2 3 4 5 6 7 8 9 = 100

Note: This answer only applies prior to the edit that clarifies that the expression on the left must evaluate to 100, rather than simply the equation being true. If you allow exponents, you can get ...
93 votes
Accepted

Can you make 1 1 1 1 = 5?

How about
78 votes
Accepted

How many consecutive positive integers can you make using exactly four instances of the digit '4'?

Answer: How?
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77 votes

Use 2, 0, 1 and 8 to make 109

Probably not the intended answer, but, I propose: Explanation:
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76 votes

Make 0 0 0 0 = 8

because
74 votes

Use the numbers 1-9 to equal 1150

Here's an answer which
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70 votes

3:3! It's a football score!

Since the puzzle oddly and specifically mentions the symbol for the square root, I used this: but rotated and reflected it giving:
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67 votes
Accepted

1 2 3 4 5 6 7 8 9 = 100

I believe that this is the smallest:
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67 votes

3:3! It's a football score!

Another answer could be
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64 votes

Make 0 0 0 0 = 8

Lateral thinking!
63 votes
Accepted

Use 2, 0, 1 and 8 to make 109

I think...
59 votes
Accepted

Making π from 1 2 3 4 5 6 7 8 9

4 ops = 1.9934200404 points: Off by 0.00108199. 5 ops = 2.2864604146 points: Off by 0.0000340537. 6 ops = 2.7136051067 points: Off by only 0.000000266764(!) Now we can keep taking square roots ...
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59 votes
Accepted

Number 88 from the digits 2, 0, 1 and 7?

What about this where
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57 votes

too easy puzzle? Try it first!

The equation is equivalent to: As $A$ to $I$ are $1$ to $9$:
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55 votes
Accepted

Create all numbers from 0-100 only using all of 1,2,3,4 and 5

Also, you can use any operation. Ok then. $\begin{array}{c|c} 0 & \log_{\frac1 2} \left( \log_{4!!-3} 5 \right) \\ 1 & \log_{\frac1 2} \left( \log_{4!!-3} \sqrt 5 \right) \\ 2 & \log_{\...
54 votes
Accepted

Making 103 from 4 zeroes

As rand al’thor points out in the solution built upon here, there must be a way to formulate a $\small 3$ with only two $\small 0 \kern1mu$s.   How promising that...   &...
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53 votes

Can you make 1 1 1 1 = 5?

How about such a variant?
  • 559
53 votes
Accepted

Make 5 5 5 5 = 19

Here's one way I found: Or, using just the characters explicitly allowed in the question:
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52 votes
Accepted

A clock for 2017

With the digits in order: $$ \begin{align} 1 &= 2 + 0 - 1 ^ 7 \\ 2 &= 2 + 0 \times 1 \times 7 \\ 3 &= 2 + 0 + 1 ^ 7 \\ 4 &= -2 - 0 - 1 + 7 \\ 5 &= 2 \times (0 - 1) + 7 \\ 6 &= ...
  • 15.9k
52 votes

Number 88 from the digits 2, 0, 1 and 7?

No rules? Looks like 88 to me if I squint.
48 votes

A clock for 2017

I tried to make a digital clock. $0 = (7 + 1 + 2) \times 0$ $1 = (2 + 7 + 1) ^ 0$ $2 = (7 + 1) \times 0 + 2$ $3 = 7 \times 0 + 2 + 1$ $4 = 2 \times 7 - 10$ $5 = 7 - 2 + 1 \times 0$ $6 = 7 - 1 + 2 \...
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48 votes
Accepted

Doubling/tripling puzzle: make 1 from 1536 in as few steps as possible

As Jo has already shown, this can be accomplished in To help visualize this problem, we can imagine: Proving minimality:
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47 votes

A truly amazing way of making the number 2016

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44 votes
Accepted

A truly amazing way of making the number 2016

And three more à la Perry
43 votes

What is the smallest set of letters that can spell any integer?

...
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42 votes

How to get 5 from 0,0,0 and 1?

First off, latest edit - just for fun, how to get 5 from just 0 and 1: Before rule change posted: With the changed rules: And while we're at it, here's $0$ to $28$: And here's how to get 5 from ...
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Only top scored, non community-wiki answers of a minimum length are eligible