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# Tag Info

## New answers tagged formation-of-numbers

1 vote
Accepted

### 2,3,6,7 to get 10

Using basic operations and a two digit number:
• 12.1k
1 vote

### 2,3,6,7 to get 10

Just using the four basic operations:
• 2,961
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:
• 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 - ...
• 1,089
3 votes

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• 1,558
2 votes

n = 13:
• 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 ...

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