Question 1146185: What is the missing number in this pattern 5, 6, _, 19, 44, 93, _?
Answer by Edwin McCravy(20060) (Show Source):
You can put this solution on YOUR website!
5 6 ___ 19 44 93 ___
1 ___ ___ 25 49 ___
Those differences are perfect squares.
1² ?² ?² 5² 7² ?²
Their square roots are
1 ___ ___ 5 7 ___
If we fill those blanks in with successive prime numbers,
1 2 3 5 7 11
we have 1 together with the primes. 1 is neither prime nor
composite, and the primes are not composite. So the sequence
1 2 3 5 7 11
is the sequence of NON-COMPOSITE natural numbers.
So the differences are the successive squares of NON-COMPOSITE natural numbers,
1² 2² 3² 5² 7² 11²
or
1 4 9 25 49 121
So we fill in the missing differences and the missing terms:
5 6 10 19 44 93 214
1 4 9 25 49 121
Edwin
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