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1 vote
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2,3,6,7 to get 10

Using basic operations and a two digit number:
Will.Octagon.Gibson's user avatar
1 vote

2,3,6,7 to get 10

Just using the four basic operations:
Especially Lime's user avatar
1 vote

2,3,6,7 to get 10

You didn't specify whether exponents and factorials are allowed so I'm assuming they are. I found 2 answers: 1: 2:
WOWOW's user avatar
  • 438
1 vote

Prime to Prime: Get all first 25 Prime Numbers using up to 4 Primes

Using 2, 3, 5, 17 2 = 2 3 = 3 5 = 5 7 = 5 + 2 11 = 17 - 3! 13 = 5 × 2 + 3 17 = 5 × 3 + 2 19 = 17 + 2 23 = 17 + 3! 29 = 17 × 2 - 5 31 = 17 × 2 - 3 37 = 17 × 2 + 3 41 = 17 × 3 - 2 × 5 43 = 5! / 2 - ...
Toby Speight's user avatar
  • 1,089
3 votes

Approximate ln(2) out of small numbers

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Tom Sirgedas's user avatar
  • 1,558
2 votes

Approximate ln(2) out of small numbers

n = 13:
Retudin's user avatar
  • 9,278
2 votes

Approximate ln(2) out of small numbers

Dividing out factors keeps both sides of the fraction small, so fewer multiplications are required for the coarse approximations and more numbers are left for fine-tuning. EDIT May 22: Another ...
AxiomaticSystem's user avatar

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