If Q= x^4 + y^4 = 100, then the greatest possible value of x is between  Choose the correct answer.
A) 0 and 3	B) 3 and 6	C) 6 and 9	D) 9 and 12	E) 12 and 15
My attempt:   If Q=x^4+y^4=100, then the greatest possible value of x would be when y is minimum.   Let y^4 be 0. Now x^4 = 100. x should be definitely greater than 3 but less than 4. The only option that fits this range is 3 and 6   Hence answer is --   b) 3 and 6.
<result>B</result>
If Q= x^4 + y^4 = 100, then the greatest possible value of x is between