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Look at this series: 22, 21, 23, 22, 24, 23, ... What number should come next?
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subtract $1$ to first number to get second number and add $2$ to second number to get third number and this process will continue.

$22-1=21$

$21+2=23$

$23-1=22$

$22+2=24$

$24-1=23$

$23+2=25$

Hence,Next Number will be $25$.

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