If 13*45=29,24*58=41,74*32=53,What shoul...

If 1345=29,2458=41,7432=53,What should 9747 be?

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The correct Answer is:

13*45=29
`implies(13+45)/(2)`=29
24*58=41
`implies(24+58)/(2)=41`
74*32=53
`implies(74+32)/(2)=53`
Therefore,
97*47
`implies`97+47=144
`implies(144)/(2)=72`

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If 13*45=29,24*58=41,74*32=53,What should 97*47 be?

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If 1345=29,2458=41,7432=53,What should 9747 be?