1 三角形中一个角为 x°=90°
5-X X-5
2 segments PS and MN intersect at point T and are diameters of the same circle.
the area of △RTM the area of △STN
3 the number of prime numbers the number of prime numbers
greater than 40 and less than 50 greater than 10 and less than 20
答案选B, 不解, 40-50中的数再怎么也比10-20中的数大吧?
4 the number of walking steps, each of length the number of walking steps, each of length of 0.5
0.4 meter, needed to walk completely along the meter needed to walk completely along the perimeter
perimeter of a square rug with side of length of a rectangular rug with length of 11meters and width
8 meters. of 8 meters.
我选C , 不解!
5 the average of 2positive integers is equal to 31 and each of the integers is greater than 26
the greater of the 2 integers 36
6 3(r/3+s/4+5/3) r-s+5
7 Mr.s Jones sold two houses for $80,000 each . one house was sold at a 20 percent loss and the other at a 20 percent gain.
the gain minus the loss 0
8 1<n<5
n is an integer
the sum of the first n odd integers n2-1
that are greater than zero.
9 when x+2 is divided by 5 the remainder is 3
the remainder when x is divided by 5 2
10 x and y are numbers on the number line.
x y