GRE Quantitative Practice, Numeric Entry
Assume that x > 5 and that 2x is a multiple of 5. If 2x + 1 < 100, how many values for x are possible?
ENTER A NUMBER IN THE BOX:
Given that 2x is a multiple of 5, x must be a multiple of 2.5. Given x > 5 and 2x + 1 < 100, the least value of x is 7.5 and the greatest value of x is 47.5. That leaves 17 possibilities for the value of x. To gain credit for answering the question correctly you would need to enter the number 17 in the numeric-entry box.