8Ô·ÝÊýѧ»ú¾×ܽá(13)
ÍøÂç×ÊÔ´ Freekaoyan.com/2008-04-10
213. D,I,I ,G,T×é³É¶àÉÙµ¥´Ê,ÆäÖÐÁ½IÖ®¼äÖÁÉÙ¸ôÒ»¸ö×Öĸ
¼Ç²»µÃÎʵÄÊÇÁ½I¼äÖÁÉÙ¸ô1¸ö×Öĸ»¹ÊÇ2×ÖĸÁË ,ÇëÆäËûµÄGÓÑÈ·ÈÏÒÔÏÂ.
²Î¿¼´ð°¸£º×÷Õß´ð°¸36
˼·£ºP5,5/p2,2-P4,4
214. ¾ßÌåÊý×ּDz»ÇåÁË,ºÃÏóÊÇÒ»¶ÑÊé,ÉÙÓÚ54±¾,·Å6±¾Ò»¶Ñ,Óà3±¾,ÎÊÓжàÉÙ±¾?
(1) ·Å7±¾Ò»¶Ñ,Óà1±¾
(2) ·Å4±¾Ò»¶Ñ,Óà3±¾
Êý×Ö²»È·¶¨(µ«7ºÍ4Á½¸öÊý×ÖÓ¦¸ÃÊǶԵÄ)
²Î¿¼´ð°¸£º a
˼·£º
215. S,P¶¼ÕûÊý,SÊÇPµÄFACTOR,SÊÇ·ñÊÇÖÊÊý?
(1)SÊÇP×îСµÄ´óÓÚ1µÄFACTOR
(2)SÒ»¹²Ö»ÓÐÁ½¸öFACTOR.
²Î¿¼´ð°¸£ºD
˼·£º
216. product A costs material at least $ n1, sale price is $p1; product B costs material at least $n2, sale price is $p2. Total amount of A and B is greater than 5000 ?
a. A and B total costs for material at least (at most?) X
b. A and B total sale is Y.
²Î¿¼´ð°¸£ºÌâÄ¿²»Ì«Ã÷È·£¬Ò²Ã»ÓоßÌåÊý×Ö
˼·£º
217. ij¹«Ë¾1990ÄêµÄʲô¶«¶«ÊÇ0.8°ÙÍò£¬Ã¿ÄêÔö³¤Ëٶȹ̶¨£¬µ½2000Ä꣨·´Õý¹²11Ä꣩¹²Éú²úÁË14.3°ÙÍò£¬ÇóÿÄêµÄÉú²úµÄÊýÁ¿µÄrange.
²Î¿¼´ð°¸£ºÈç¹ûÔö³¤ËÙ¶ÈÊǾø¶ÔÖµ0.8+11X=14.3£¬Èç¹ûÔö³¤ËÙ¶ÈÊǰٷֱÈ0.8*(1+x)^11=14.3
˼·£ºÓиö´ð°¸ÊÇ1£¬ÓиöÊÇ1.2»¹Óв»¼ÇµÃÁË£¬ÎÒ×îºóÑ¡ÁË1.2Ó¦¸Ãû´í¡£·´ÕýÆäËû¼¸¸ö´ð°¸¶¼±È1С£¬¿ÉÒÔÏÈÇóËãÊõƽ¾ùÖµÔÙ×÷±È½Ï£¬°ÑСÓÚµÈÓÚ1 µÄ´ð°¸Åųöµô¡£
[°æ±¾2]ÔÀ´ÓÐ0.8 million, after 11 years 13.4million(not sure), the annual increased rate is same, ask the rate.
²Î¿¼´ð°¸£º0.1
˼·£º
218. ÓÐÈË×ß·4mile/hour,Åܲ½6mile/hour ÎÊ×ß·5mile ¼ÓÉÏÅܲ½3mileµÄƽ¾ù¶È
²Î¿¼´ð°¸£º32/7
˼·£º
219. ¹²300ÈË£¬¸ÉaµÄ120ÈË£¬¸ÉbµÄ240ÈË£¬Ê²Ã´¶¼²»¸ÉµÄ40ÈË£¬ÎʸÉaÓÖ¸ÉbµÄ¶àÉÙÈË£¬
²Î¿¼´ð°¸£º100
˼·£º
220. R S ÊÇÖÊÊý ÎÊ R+S ÊÇ·ñÊÇprime number
(1) r< 10
(2) s ÊÇ even
²Î¿¼´ð°¸£ºE
˼·£º7+2=9
222. 1998 ÄêijÈ˹¤×ÊÊÇ 1997ÄêµÄ 4/3 £¬ 1999 Äê ËûµÄ¹¤×ÊÊÇ 1997ÄêµÄ 7/3 ÎÊ 1999Äêµ½1998Ä깤×ÊÔö³¤µÄ °Ù·Ö±È ¾ßÌåÊý×Ö¿ÉÄܲ»×¼È·
²Î¿¼´ð°¸£º
˼·£º(7/3-4/3)/(4/3)
223. Ò»ÖÖ tax ÓÉÈýÖÖ˰×é³É a b c ÎÊ ÕâÖÖtax¡¡µÄ¡¡amount ÊǶàÉÙ £¿
£¨1£©a µÄ amount Ò»¸ö¾ßÌåÊý £¨2£©b ±Èc µÄ amount ÉÙ¶àÉÙ Ò»¸ö¾ßÌåÊý
²Î¿¼´ð°¸£ºd
˼·£ºÓ¦¸ÃÓÐÒ»¸öabcÖ®¼äµÄ±ÈÀý¹ØÏµ
224. Óë y=5x ´¹Ö±µÄÖ±ÏßÊÇÄÄÌõ
²Î¿¼´ð°¸£ºÑ¡Ð±ÂÊÊÇ-1/5 µÄÄǸö
˼·£º
225. Ò»¸öÈË ÓÐÁ½ÖÖͶ×Ê a ÿÄê»ñÀû x% , b »ñÀû y% ÎÊ Õâ¸öÈËÒ»¹²»ñÀû¶àÉÙ £¿
£¨1£©mx+ny=z m,n,z ¶¼ÊǾßÌåÊý ²»¼ÇµÃÁË
£¨2£©x=2/3 y
²Î¿¼´ð°¸£ºc
˼·£º
226. 7¸öconsecutive integers £¬ÎÊ ºÍÊÇ·ñÄܱ»12Õû³ý
£¨1£© ÖÐÊýÊÇ 12 £¨2£©Æ½¾ùÊýÊÇ12
²Î¿¼´ð°¸£ºd
˼·£º
227. Ò»Á¾³µ ƽ¾ùËÙ¶ÈÊÇ x kilometers/hour ÎÊ Ã¿Ãë¶àÉÙmile ÌâÀïÓл»Ë㵥λ¡£
²Î¿¼´ð°¸£º
˼·£º
229. X >0 £¬ Y <0£¬ÎÊÄǸö´óì¶0
²Î¿¼´ð°¸£º(X-Y)
˼·£º
234. 10-pounds sample,5% is metal, the rest is rock. the metal is composed of gold and silver. silver is 10 times as much gold. ask: what is the gold's weight?
²Î¿¼´ð°¸£ºÔ¼0.045
˼·£º10*5%/11
