03-25-2011, 06:11 AM
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica, san" id="quote">quote<hr height="1" noshade id="quote"><i>Originally posted by Dard</i>
<br />I am not good at sequences, but i tried. 65/2= 32.5, the second number is 2.5 more than 32.5(ie. 35). 35/2= 17.5, the third number is 0.5 less than 17.5(ie 17). So the sequence is a, b=a/2+2.5, c=b/2-0.5, d=c/2+2.5, e=d/2-0.5 and so on. Therefore the fourth number is 17/2+2.5= 11.
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this justification would be correct if there were 5 numbers..any ways i also wrote 11 p but it was just a guess no calculation lol
<br />I am not good at sequences, but i tried. 65/2= 32.5, the second number is 2.5 more than 32.5(ie. 35). 35/2= 17.5, the third number is 0.5 less than 17.5(ie 17). So the sequence is a, b=a/2+2.5, c=b/2-0.5, d=c/2+2.5, e=d/2-0.5 and so on. Therefore the fourth number is 17/2+2.5= 11.
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this justification would be correct if there were 5 numbers..any ways i also wrote 11 p but it was just a guess no calculation lol
