单项选择题

On a certain number line，if-7 is a distance4 from n and 7 is a distance or 18 from n then n=（）

A. 25
B. 11
C. 3
D. -3
E. -11

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单项选择题
On the number line，1.4 is halfway between which of the following pairs of numbers（）

A. -1.4 and 2.4
B. -1 and 2
C. -0.3 and 3.1
D. 0.15 and 1.55
E. 0.4 and 1
单项选择题
If x is an integer and x2＜37，what is the greatest possible value of x minus the least possible value of x（）

A. 5
B. 6
C. 10
D. 12
E. 36
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