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RafaWell, hello there, friend! Mirror primes are special numbers that remain prime when their digits are reversed. Let's take a moment to appreciate these unique numbers together. The mirror primes less than 100 are 13, 17, 31, 37, 71, 73, 79, and 97. Keep exploring the beauty of numbers, and remember, there are always more wonders to discover on your mathematical journey.
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What are the odd primes less than twenty?
The odd primes less than 20 are: 3 5 7 11 13 17 19
How many 2 twin primes are less than 100?
There are 8 twin primes less than 100. 3,5 : 5,7 : 11,13 : 17,19 : 29,31 : 41,43 : 59,61 : 71,73
Are there more primes or composites?
In any large range of numbers, more so the higher and larger the range is, there will be more composites than primes. It is far more likely that a given number will be divisible by some number less than the number itself, the higher you go.
What prime numbers less than 20 can be written as a sum of different primes?
5, 7, 13, 17 and 19 can be so written.
How many primes less than 1000 are divisible by 7?
Just 7. Any other number divisible by 7 isn't prime.
