Science Quiz / Math: Sometimes, Always, Never

Random Science or Math Quiz

Can you name the validity (sometimes, always, or never) of each statement below? See 'How to Play' for assumptions.

 Plays Quiz Updated Feb 10, 2015

How to PlayForced OrderWrong Answers
Score 0/15 Timer 15:00
for odds n and m, n*m is even
if x^2=1, then x=1
if x! = 1, then x=0
if x+y = z+y, then x=z
if x*y < 0, then x<0 or y<0
for x,y>0, if x/y < 1, then x < y
x*y > x+y
for prime p, p*x is also prime
for x,y ≠ 0, if x = 2*y, then x is even
for primes p,q,r, p*q*r+1 is prime
the sum of the interior angles of a triangle (Euclidean geometry) is 180º
if odd prime p = x^2 + y^2, then p ≡ 1 (mod 4)
for x,y,z ≠ 0 and n > 2, x^n + y^n = z^n
for prime p, x^p - x is divisible by p
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