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GRE Quantitative Practice, Numeric Entry

Question 1

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:

Explanatory Answer

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.