GRE Quantitative Practice Questions — Numeric Entry Format
Assume that 2x is a positive multiple of 5 and is greater than 5. If 2x + 1 < 100, how many values for x are possible?
[NOTE: On the actual exam you would enter a number in the box.]
Answer and Analysis
The correct answer is 17. (To gain credit for answering the question correctly you must type the number 17 in the numeric-entry box.) Given that 2x is a multiple of 5, x must be a multiple of 2.5. The total number of such multiples from 2.5 to 50 is 20. Given that x is greater than 5 and that 2x + 1 < 100, you must eliminate 2.5, 5.0, and 50 from the list of 20 multiples, which leaves 17 possible values for x.