jj in Canada on 23/12(supplementary)

2002-12-25 15:34:22

Math;

DS: there are 36 cards, divided in 4 groups, the card numberin each group is from 1 to 9 . Now pick up a card from one of the four groups, which number is the picked card?

(1) 个位数 of the sum of the rest 35 cards is 6
(2)the sum of the rest 35 cards is 176

DS: QUESTION : xy > x^2y^2
(1) 13 x^2 = 7
(2) y^2 = 1

DS : QUESTION x +y = ?
(1) zx + zy = z
(2) xy = 0

PS: There are total 88 defective products and a number of technicans. If each techican picks up equal defective products from the 88 products, the number of the remained defective products is 2 less than the number of the total technicans. Which of the following number can not be the numbers of technicans?

(1) 5, (2)7 (3) ?

PS. sum of three numbers is 30, which of the following is true about the median?
(1) 9
(2)10
(3) 11
(a) (1) + (2)
(b) (1) + (3)
(c) (1) only
(d) (1) +(2) +(3)

三个圆A,B,C 。问A》B？
（1） A》C AND B》C
（2） B，C 是同心圆

PS. there are 9 students, now the teacher want to pick up four 6 students to perform a program, how many combination?

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