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| Aphonic Observer Status: Offline Posts: 7,585 Reputation: 18951 Rep Power: 53 Join Date: Mar 2005 Location: Oubliette Gender: Way of Life: Muslim | Quote:
OK now here comes the next one......... The ages of a father and son add up to 66. The father's age is the son's age reversed. How old could they be? (3 possible solutions). this one should be abit easier for the ones who are good in maths......so give it a try...i am sure there are lots of ppl in this forum who are xtremely good at maths..........;) when i reach the 5th riddle i will probably answer the first question if no one gets the answer to it....... :sister: | |
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| Administrator Status: Offline Posts: 5,161 Reputation: 13017 Rep Power: 45 Join Date: Dec 2004 Gender: Way of Life: Muslim | Quote:
Simple algebra. Let R rep. apples in right hand, L rep. apples in left hand. Quote:
L=R+2 (the left hand has two more apples than the right hand) Quote:
Since L=R+2, then... 2(R-1)=(R+2)+1 2R-2=R+3 2R=R+5 R=5 IF R=5 and L=R+2, then L=(5)+2=7 There are seven apples in the left and five apples in the right. | |||
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| Aphonic Observer Status: Offline Posts: 7,585 Reputation: 18951 Rep Power: 53 Join Date: Mar 2005 Location: Oubliette Gender: Way of Life: Muslim | Quote:
thats CORRECT!!! try the next one and im sure it'll be correct :sister: | |
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| Administrator Status: Offline Posts: 5,161 Reputation: 13017 Rep Power: 45 Join Date: Dec 2004 Gender: Way of Life: Muslim | Quote:
By "reversed" I assume you mean that is the father's age is 56, then the son's age is 65? Okay, let's take a look at the question then. We will just set up some matrices. The age's must be two digit numbers since they add up to 66. If the father's age is represented by [x y], then the son's age is represented by [y x]. From the question, we know that: [x y] + [y x] = [6 6] Therefore, any value that satisfies the equation x+y=6, is an acceptable digit of the ages. Possible substituions include: 1+5=6, 2+4=6, 3+3=6 Therefore, the possible ages of the father and the son (respectively) are: 51 and 15 24 and 42 the last one (33 and 33) is inadmissable because the father and the son cannot be of the same age. Is this correct? | |
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| MuslimahFeeSabeelillah Status: Offline Posts: 87 Reputation: 22 Rep Power: 22 Join Date: Apr 2005 Gender: Way of Life: Muslim | Quote:
I first thought it was 33 but than remembered the father and son couldn't be the same age "If you are patient in one moment of anger, you will escape a hundred days of sorrow" :applaud: "Indeed Islamic History is not written except with the blood of the Shuhadaa (Martyrs), except with the stories of the Shuhadaa and except with the examples of the Shuhadaa". | |
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| Administrator Status: Offline Posts: 20,487 Reputation: 52976 Rep Power: 110 Join Date: Jan 2005 Location: Cyberabad Gender: Way of Life: Muslim | I like these ones, esp those maths ones, in the entrance exam for MCA[which i'm doing currently], v had similar questions, abt 200, tht too to do them in just 150 Mins [2 & 1/2 hrs] n i scored excellent marks the entrance exam for BCA was also similar but there v had 2 hrs n 150 questions. n there too i topped in my college so..... let some gud ones flow in... |
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