我又要麻烦大家帮我看看拉 GWD-15 math

needthat

我用脑袋加上手指头和脚趾头也没有想明白
Q3:

If the units digit of the three-digit positive integer k is nonzero, what is the tens digit of k?

(1)The tens digit of k + 9 is 3.

(2)The tens digit of k + 4 is 2.

ans A
If R = P/Q

, is R ≤ P ?
(1)P > 50

(2)0 < Q ≤ 20


ans E
In the figure shown, the circle has center O and radius 50, and point P has coordinates (50,0).If point Q (not shown) is on the circle, what is the length of line segment PQ ?

(1)The x-coordinate of point Q is – 30.

(2)The y-coordinate of point Q is – 40.


ans A