Grow wisdom to win!(170)
2021-06-19 ¿ÀÈÄ 12:07:27 | Á¶È¸ : 2247
grow wisdom to win!(170)
**
*****
=
<Á¦ 170 ȸ> jeanÀº ¸î »ìÀΰ¡?
/ how old is jean?
.
[q] :
Á¶¿î(joan)°ú ÀçÀÎ(jane)Àº ÀڸŵéÀÌ´Ù.
joan and jane are sisters.
.
jeanÀº joanÀÇ µþÀÌ°í ±×³àÀÇ À̸𺸴٠12»ìÀÌ ¾î¸®´Ù.
jean is joans daughter and 12 years younger than her aunt.
.
joanÀº ÁöÀÎ(jean)ÀÇ µÎ ¹èÀÇ ³ªÀÌ´Ù.
joan is twice as old as jean.
.
4³â Àü¿£,
joanÀº Áö±ÝÀÇ janeÀÇ ³ªÀÌ¿Í °°¾Ò°í,
janeÀº ±×³àÀÇ Á¶Ä« º¸´Ù µÎ ¹è¿´´Ù.
four years ago,
joan was the same age as jane is now,
and jane was twice as old as her niece.
.
jeanÀº ¸î »ìÀΰ¡?
how old is jean?
.
º¸±â :
°¡) 12 ³ª) 14 ´Ù) 16 ¶ó) 18
[´ä] ( )
----------------------------------------* Á¤´äÀº ´ÙÀ½ ȸ¿¡ ÀÖÀ½.
[Á¦ 169 ȸ Á¤´ä ¹× Çؼ³]
Á¤´ä : ³ª) $9.00 .
Çؼ³
óÀ½ 29ºÒ - book (4 x 3=12) - Å©·¹¿ë(4 x 2=8) = 9ºÒ
----------------------------------------
[Á¦ 170 ȸ Á¤´ä ¹× Çؼ³]
Á¤´ä : ´Ù) 16
Çؼ³ :
joan = x, jane = y jean = z --·Î ÇÏÀÚ.
(1) z = y - 12
(2) x = 2z
(3) x -4 = y
(4) y -4 = 2(z-4)
ÀÌ°ÍÀ» Ç®¾îº¸¸é,
so joan is 32, jane is 28, and jean is 16.
==
<¿À´ÃÀÇ ¸í¾ð>
¡°¿ìÁÖÀÇ ±âº»Àû ¹ýÄ¢ Áß Çϳª´Â ¿Ïº®ÇÑ °ÍÀº ¾ø´Ù´Â °ÍÀÌ´Ù.
½±°Ô ¸»ÇØ ¿Ïº®ÇÔÀº Á¸ÀçÇÏÁö ¾Ê´Â´Ù.
ºÒ¿ÏÀüÇÔÀÌ ¾ø´Ù¸é ´ç½Åµµ ³ªµµ Á¸ÀçÇÏÁö ¸øÇÒ °ÍÀÌ´Ù.¡±
-- 2016³â ±×ÀÇ »ýÀü ÀÎÅͺ信¼.
--- stephen william hawking(½ºÆ¼ºì ȣŷ) ¿µ±¹ÀÇ ÃµÃ¼¹°¸®ÇÐÀÚ
.
born: january 8, 1942, oxford, united kingdom
died: march 14, 2018, cambridge, united kingdom
==
±×ÀÇ ¡°½Ã°£ÀÇ ¿ª»ç¡± ´Â ¼¼°èÀûÀ¸·Î 1õ ¸¸±ÇÀÌ»ó ÆÈ·È´Ù°í ÇÑ´Ù.
2006³â »ý½Ã ÀÎÅͺ信¼
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žçÀÌ Áö±¸¸¦ »ïų °ÍÀÌ´Ù. ¡± ¶ó°í Çß´Ù.
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¾î¶² ÀÌÀ¯µç ´ç½ÅÀº ÇöÀçÀÇ »î¿¡ ºÒÆò, ºÒ¸¸ÀÌ Àִ°¡?
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google¿¡¼ ÀÌ ºÐÀÇ ÀÏ»ýÀ» ã¾Æº¸¸é
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Àá°£ µé·È´Ù °¡´Â Àλý,
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