Question 1
Number Theory
Level
2
Let's get started...
Of the following choices, which number is NOT prime (no, you do NOT need a super computer).'
Please do not make this question a 25% point grabber.It is much more beautiful than that...
66222314685497647953561
3433
87178291199
170141183460469231731687303715884105727
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1 solution
I just added all the digits of the number of each of the options to find divisibility by 3 and found the last option to be divisible by 3 ,which cannot be prime.