[計量] 請問印度11/9
要考了，很緊張，這幾題jj數學還不會，麻煩大家幫幫我，感謝
印度11/9
1. Given that a salesman gets 12% commission on the sales upto $500 and
he gets 20% commission on further sales amount on that day. If the salesman's
total commission is $380 on that day, then how much amount did he sell on
that day?
(網路上答案是2100，可是我不知道怎麼算><)
4. If|3x+2| = 8
Col A: |X|
Col B: 3
(為什麼是D)
9. If a Rectangular plate can hold 3 cubic feet, then
Col A: The number of cubic yards that 100 such plates can hold
Col B: 13
(為什麼是A)
10. There is a series of numbers 5, 12, 26.........till 100 terms.
Which of these cannot be a term of the series?
A. 57
B. 75
C. 96
D.89
E. 47
(這題我就用7的倍數加 ，像是26+21=47,47+28=75,75+35=110，可是除了
選項內的B.75，E.47是這範圍內的之外，其他ACD都不是阿，
那網路上答案為什麼只有A呢?)
11. Given 1 < xy < 4 and 1 < y < 2,
Col A: x
Col B: 2
(為什麼是A)
17. A rectangular sheet is divided into unequal squares with total number of rows in the rectangle 'n' and columns 'n+2'. If the minimum value of n is 21, then
Col A: The area of the square present in the 15th row and 18th column
Col B: n^2
(這題不會算)
18. Two spheres have their volumes as 4Y and 3y, where y is some integer.
Col A: The ratio of their radius
Col B: 4/3
(這題他的大Y和小y是一樣的意思嗎?所以是C嗎?)
以上是我不會的，麻煩各位了，謝謝!
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