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find out the number.
This is a discussion on find out the number. within the Brainteasers forums, part of the Brain Gym category; Consider the following triangular arrangement of numbers. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • • • • • • The middle ...
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09-17-2006
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find out the number.
Consider the following triangular arrangement of numbers.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • • • • • • The middle number of the 51st row is? -- James. 
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10-25-2006
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Re: find out the number. -- Answer
It is obvious that line 'n' ends with the number n*(n+1)/2.
( line 2 ends with 2*3/2=3 line 3 ends with 3*4/2=6 and line 4 ends with 4*5/2=10) Therefore line 50 will end with the number 50*51/2 =1,275 middle number in the 51st row is the 26th number in the row. Hence Middle number in the 51st row is 1,275 +26 = 1,301. -- James.
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01-24-2007
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Re: find out the number.
the middle no of 51 st row is 197
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01-24-2007
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Re: find out the number.
is it 1300
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01-25-2007
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Re: find out the number.
and I confirm it wud b 1301
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01-25-2007
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Re: find out the number.
Please check this
Quote:
(Second post in the thread) Cheers! Kalayama
__________________
[COLOR="Blue"][SIZE="2"]"If you are not living on the edge of your life, you are wasting space"[/SIZE][/COLOR] Someone says "Impossible is nothing". The man next him says "Let me see you licking your elbow tip!"
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