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All the magic goes when you understand it’s 30+21
Why? 19 is 15+4 but is still prime?
Because 30 and 21 are both divisible by the same number, 3.
Exactly 3(10+7)
I always thought it’s 31+20
All the magic goes when you understand it’s 30+21
Why? 19 is 15+4 but is still prime?
Because 30 and 21 are both divisible by the same number, 3.
Exactly 3(10+7)
I always thought it’s 31+20