Numbers Puzzles
45.  Which number is the odd one out? 571219 461016 831114 461016 971613 781523 

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46.  16, 23, 19, 19, 22, 15, 25, ? What number should replace the question mark? 

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47.  Which four figure number contains four different digits and meets the following criteria? The first digit is twice the value of the fourth digit and two more than the second digit. The third digit is one more than the first digit and four more than the fourth digit. 

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