what is the value of x ?
1. when x is multiplied by 8, the result is between 50 and 60
2. When x is doubled the result is between 10 and 15.
(E) x can be a mixed number or an integer
is the positive integer n equal to the sqaure of an integer ?
1. for every prime number p, if p is a divisor of n then so is p^2
2. (n)^1/2 is an integer
stmnt. 2 (n)^1/2 = sqrt(n) = (m)(m)=n or (-m)(-m)=n (Sufficient)
stmnt. 1 translates to n >= p*p^2, p may or may not be the only divisors (Insufficient)