2, 3, 5, 7, 11, 13, 17,... what's the next number?
That's not so easy! The series is that of the prime numbers. A prime number is one that is divisible only by itself and 1. For example 21 is not a prime number (it is divisible by 3 and 7). After 17 the next prime number in sequence is 19.
Anyway, we checked your knowledge of math and your logic!
More Info:
en.wikipedia.org
What are your thoughts on this subject?
125 Comments
kopackorl
The choices made the answer obvious.
DannyBoy
It seemed obvious to me.
Joseph Posada
Prime numbers lol
Kat Frederick
Algernon Bhoomz...How do you figure that 20 is a Prime number?? It's not a Prime number, as it can be divided by 2 and 10! Prime numbers can only be divisible by itself and 1! With that said, 20 is definitely NOT a Prime number!
20÷10=2 20÷2=10 20÷1=20 20÷20=1
Also, it's. "Could Have Been", not " Could Of Been"! Guess Physicist don't need to use proper English, eh?
tdelisi
If you are a Physicist then you are expected to know the pattern of prime numbers.
Player
My knowledge of math and logic proved to be adequate.
Jackie
I guessed.
Beejay♥️♥️
It was just a series of prime numbers. Super easy.
Maggie
It was so easy
Four from bfb
im dumb at math i didnt get it
Luna
Not good in math but i got it!
Sandra
First time EVER I get a Maths sequence or Maths in general correct 😯😯😯😯😯
Peter Blake
Easy if you don't over think it
Yuliya Skripchenko
Mathematics. :)....wohooo
cmdvger
Kat Frederick, 20 can also be divided by 4 and 5.
tinaloflin
That was harder for me.
Spc Kook Dude
I couldn't Wikipedia the answer! Not fair!
monicaligon
Got it
Celeste Pereyra
Not good in math. I needed a hint, then got it right.
Mohan Krishnan
Got it prime number