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

Answer

971613 Numbers are obtained by adding pairs of digits, ie with 571219. 5 + 7 = 12; 7 + 12 = 19. To follow this same pattern 971613 would have to be 971623.

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

Answer

11. There are two alternate sequences: +3 and –4;

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.

Answer

6473.