After the answer to 3 was invented.
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prime numbers are invented by srinivasan ramanujan, an Indian mathematician.
The number 4 is in the exact middle.
No, the number 4 is not a prime number because 2X2 = 4.A prime number is a number that can only be divided into 1 and itself.No.
If the last number is divisible by 4 then the whole number is divisable by 4
If the number can be divided by 4 exactly then 4 is a factor. No matter how long the number is, if the last two digits of the number are divisible by 4, then 4 is a factor of the number. Conversely, if the last two digits are not divisible by 4, then 4 is not a factor.