What number goes into the blank? 9,61,52,63,94,__,18 please answer withproof thank you
by 
ricardos
ANSWERS: 3
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Strictly speaking, any number can go in the blank. You can find a formula which fits through any sequence of numbers you like. It's curious that the numbers 61 52 63 94 form a perfect quadratic though. If you ignore the first and last numbers of your sequence, the next number would be 145 EDIT: Starson obviously has the right answer. Square numbers written backwards.
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46 I remember this from school, its square numbers reversed 9,16,25,36,49,64,81.....switch the numbers round and you have your sequence
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what number can go into 72
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