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View Full Version : I don't know how to find the missing number

tanjia
May 8, 2012, 01:56 PM
$1,$3,$5 ?means:13
ebaines
May 8, 2012, 02:23 PM
$1,$3,$5 ?means:13

It appears obvious that the next number after $5 would be $7, but I don't uderstand why you wrote "?means: 13" - please clarify.