填数字123(15)234(27)345(38)456(45)789()
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填数字123(15)234(27)345(38)456(45)789()
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567
The pattern is that the sum of the first and third digits is multiplied by the second digit to get the missing number.
For example:
1 + 3 = 4
4 * 2 = 8
So, for the given series:
1 + 5 = 6
6 * 2 = 12- -> 12 should be in parentheses
2 + 4 = 6
6 * 3 = 18- -> 18 should be in parentheses
3 + 5 = 8
8 * 4 = 32- -> 32 should be in parentheses
4 + 6 = 10
10 * 5 = 50- -> 50 should be in parentheses
7 + 9 = 16
16 * 8 = 128- -> 128 should be in parentheses
Hence, the missing number is 567.
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