Edited by 10., 30 December 2006 - 09:04 AM.
Mental Ability
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Guest_10.
, Dec 06 2006 05:12 PM
807 replies to this topic
#201
Guest_10.
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Posted 28 December 2006 - 09:41 AM
Correct.The Rules :- Answer in full sentences- Give a reason why you think so and explain it properly- Each question carries 1 mark untill I mention the marks.- I will change the question in 3 days if no one answers the questions correctly.Q.37 7, 15, 32, ?, 138, 281?ScoreBoardHadel : 14.5 DeadRevenger : 13penguinman : 6Sakayushi : 5kwiksylver : 3Kv. : 2Chaniel : 2.5pegasus 5050 : 2.5daovs : 1Rainy Day : 1gba3000 : 0.5JKY : 0.5Please let me know if there is any mistake in the post.
#202
Guest_Sakayushi
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Posted 28 December 2006 - 11:41 AM
7, 15, 32, 67, 138, 281The first number is multiplied by 2 and then has one added to it to get the second, the second is multiplied by 2 and has two added to it to get the third, the third is multiplied by 2 and has three added to it to get the forth, etc.the pattern is:a(n) = a(n-1) * 2 + n for n >= 0, where n = the term number and a(0) = 7so a(3) = a(2) * 2 + 3, and a(2) is 32, so 32*2+3 is 67(all credit for this post goes to my brother. He's the best brother in the world)
#203
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Posted 30 December 2006 - 09:26 AM
Correct.The Rules :- Answer in full sentences- Give a reason why you think so and explain it properly- Each question carries 1 mark untill I mention the marks.- I will change the question in 3 days if no one answers the questions correctly.Q.38 Use the numbers 1 to 9 only once and arrange them in a order using "+" and "=" signs to get a total of 100?ScoreBoardHadel : 14.5 DeadRevenger : 13penguinman : 6Sakayushi : 6kwiksylver : 3Kv. : 2Chaniel : 2.5pegasus 5050 : 2.5daovs : 1Rainy Day : 1gba3000 : 0.5JKY : 0.5Please let me know if there is any mistake in the post
Edited by 10., 01 January 2007 - 11:37 AM.
#204
Eärendil
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Posted 30 December 2006 - 03:53 PM
You can't do that, any combination of the first 9 digits will lead to a multiple of 9, nad 100 is not.
He saw the Mountain silent rise
where twilight lies upon the knees
of Valinor, and Eldamar
beheld afar beyond the seas.
#205
Guest_Hunda
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Posted 30 December 2006 - 06:08 PM
However you can use some abstract thought here. For example, 9+1=91 perhaps that is what he was getting at.4+5+7+8+9=336+3=6363+33=9696+1+2=99I can only get that....perhaps it is impossible, but there is a possiblity for 101.Well I'll shut up now..Dang.
#206
Guest_Hagi
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Posted 30 December 2006 - 06:33 PM
if you use minus it's possibleonly in that wayexample:123+45-67+8-9=100
#207
Guest_Hunda
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Posted 30 December 2006 - 06:49 PM
lol it might have been, the = and- are right next to each other.
#208
Guest_10.
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Posted 31 December 2006 - 05:23 PM
Nope. You only have to use + and = signs.
#209
Guest_pegasus_5050
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Posted 31 December 2006 - 07:40 PM
I found this online:The sum of all numbers 1-9 is 45.Since this is too low (to reach 100) you must use some 2 figure numbers (23, 34, etc.)but *all* of these give you an addition of a multiple of 9for instance use '12' instead of '1+2'( creates an additional 9 since you have to remove the 1 and 2 )your total is now 45 - 1 - 2 + 12 = 54.No matter what doubles you choose, they will always add some multiple of 9.Assume that the high part of your double is 'a' and the low part is 'b' (10a + B ) - a - b = 9a For you to succeed you need to add 55 (to reach 100) to your original total. You can't do this with multiples of 9.It was so long ago, I can't remember where. Anyway, I guess this explains what Earandil meant.So... I guess we are allowed to use division (to make fractions) or the use of decimal places or powers, right? Else, I too cannot find a way to solve it.
Edited by pegasus_5050, 31 December 2006 - 07:43 PM.
#210
Eärendil
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Posted 31 December 2006 - 08:11 PM
Decimal places won't help. It is easy to show, that no matter how you arrange them, even if you use zeros (multiply by 10) or decimal (divide by ten), you can get rid of the nine. It can only be solvede using "-" as shown above.
He saw the Mountain silent rise
where twilight lies upon the knees
of Valinor, and Eldamar
beheld afar beyond the seas.
#211
Guest_Linkino
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Posted 31 December 2006 - 11:14 PM
Just a question for this can u use negative numbers?
#212
Guest_Hunda
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Posted 01 January 2007 - 04:55 AM
no only one through nine. one through nine are only positive.
#213
Guest_Sakayushi
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Posted 01 January 2007 - 10:56 AM
5 + 2 = 7 + 84 = 91 + 6 + 3 =There's your answer. It gives you 100 as the result.Please refer all credit and awe and reverence to my very intelligent and amazing brother. Applause will also be welcome.
#214
Guest_10.
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Posted 01 January 2007 - 11:40 AM
Correct. There is another way also 15 + 36 + 47 = 98 +2 = 100. Certainly your brother is great.The Rules :- Answer in full sentences- Give a reason why you think so and explain it properly- Each question carries 1 mark untill I mention the marks.- I will change the question in 3 days if no one answers the questions correctly.Q.39 A boy walks 3 km straight, turns right and walks 4 km straight, then again turns right and travels 6 km straight again. How far is he from the starting point?ScoreBoardHadel : 14.5 DeadRevenger : 13Sakayushi : 7penguinman : 6kwiksylver : 3Kv. : 2Chaniel : 2.5pegasus 5050 : 2.5daovs : 1Rainy Day : 1gba3000 : 0.5JKY : 0.5Please let me know if there is any mistake in the post
Edited by 10., 03 January 2007 - 08:18 AM.
#215
cgfreak
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Posted 01 January 2007 - 11:48 AM
Well, then he travels like this...
_ _ _ _| || || | | | |Seeing the starting point and the ending point form a triangle with the diagonal, and the two smallest sides are 3m and 4m, Pythagoras allows us to calculate a²=b²+c² => a²=3²+4² => 25 = 9+16.He is 5 metres from his starting point.
i do remember one thing.
it took hours and hours but.
by the time i was done with it.
i was so involved. i didn't even know what to think.
i carried it around with me for days. and days.
playing little games.
like. not looking at it for a whole day.
and then. looking at it.
to see if I still liked it.
i did.
it took hours and hours but.
by the time i was done with it.
i was so involved. i didn't even know what to think.
i carried it around with me for days. and days.
playing little games.
like. not looking at it for a whole day.
and then. looking at it.
to see if I still liked it.
i did.
#216
Guest_Sakayushi
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Posted 01 January 2007 - 07:58 PM
It would be 5km. same method as ^. BTW my brother is NOT great!!! 
Edited by Sakayushi, 01 January 2007 - 08:05 PM.
#217
Guest_10.
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Posted 03 January 2007 - 08:21 AM
You both get half point each.The Rules :- Answer in full sentences- Give a reason why you think so and explain it properly- Each question carries 1 mark untill I mention the marks.- I will change the question in 3 days if no one answers the questions correctly.Q.39 I have a large cube of side 10 cm. Then I paint the cube blue which was white earlier. Then I divide the cube into smaller cubes of 1cm side. How many small cubes are there with paint on 3 faces?ScoreBoardHadel : 14.5 DeadRevenger : 13Sakayushi : 7.5penguinman : 6kwiksylver : 3Kv. : 2Chaniel : 2.5pegasus 5050 : 2.5daovs : 1Rainy Day : 1gba3000 : 0.5JKY : 0.5cgfreak : 0.5Please let me know if there is any mistake in the post
Edited by 10., 06 January 2007 - 03:11 PM.
#218
Guest_DeadRevenger
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Posted 03 January 2007 - 10:53 AM
8... cause only the corners would have paint or 3 sides so 8 corners and 8 blocks, one from each corner
Edited by DeadRevenger, 03 January 2007 - 10:53 AM.
#219
Guest_10.
Guest_10.
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Posted 03 January 2007 - 11:26 AM
Correct. This question is based on the above question. There is a series of question base on the above one. I will add the points in the scoreboard later. Q.How many cubes are painted ONLY on 2 faces?
Edited by 10., 03 January 2007 - 11:43 AM.
#220
cgfreak
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Posted 03 January 2007 - 11:34 AM
The same answer as the above question, 8.
i do remember one thing.
it took hours and hours but.
by the time i was done with it.
i was so involved. i didn't even know what to think.
i carried it around with me for days. and days.
playing little games.
like. not looking at it for a whole day.
and then. looking at it.
to see if I still liked it.
i did.
it took hours and hours but.
by the time i was done with it.
i was so involved. i didn't even know what to think.
i carried it around with me for days. and days.
playing little games.
like. not looking at it for a whole day.
and then. looking at it.
to see if I still liked it.
i did.
#221
Guest_10.
Guest_10.
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- Guest
Posted 03 January 2007 - 11:43 AM
Wrong read the question again.Q.How many cubes are painted ONLY on 2 faces?
#222
Guest_Sada
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Posted 03 January 2007 - 11:47 AM
12 sides on a cube, which got cut up into 10 per each row, the corners have 3 so 8*12 = 9696 cubes
#223
Hadel
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Posted 03 January 2007 - 11:52 AM
12 sides on a cube??? But a cube has 6 sides.12 sides on a cube, which got cut up into 10 per each row, the corners have 3 so 8*12 = 9696 cubes
Thanks to DownShift... whatever happened to him anyway?
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#224
Guest_10.
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Posted 03 January 2007 - 11:54 AM
Wrong try again and there are 12 edges not 12 sides.
#225
Guest_Sada
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Posted 03 January 2007 - 01:42 PM
Oops i meant edges, lol, wasn't thinking very straight And i still think it's 96.Reason :There are 12 edges. These edges are the where the cubes with only 2 faces painted are. Only the corners aren't as they have 3 faces painted. So this mean on each edge there are 8 cubes with only 2 sides painted. 8*12= 96....Maybe i'm reading the question wrong...
And i still think it's 96.Reason :There are 12 edges. These edges are the where the cubes with only 2 faces painted are. Only the corners aren't as they have 3 faces painted. So this mean on each edge there are 8 cubes with only 2 sides painted. 8*12= 96....Maybe i'm reading the question wrong...
Edited by Sada, 03 January 2007 - 01:43 PM.
