If the range of the set of numbers {140, 80, 135, 110, 175, 145, x, 123, 136} is 105, which of the following could be x?  Options:
A) 40 B) 50 C) 60 D) 70 E) 80
The range of the other 8 numbers is 175-80= 
<gadget id="calculator">175-80</gadget>
<output>95</output>
95, so x must be either the smallest number or the largest number in the set.   Then x= 175-105= 
<gadget id="calculator">175-105</gadget>
<output>70</output>
70 or x= 80+105= 
<gadget id="calculator">80+105</gadget>
<output>185</output>
185   The answer is 70.
<result>D</result>
If the range of the set of numbers {140, 80, 135, 110, 175, 145, x, 123, 136} is 105, which of the following could be x?