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Have a look at the series: $4,7,5,8,6,9,\dots\dots,\dots$

What number should come next?

1. $7$
2. $9$
3. $10$
4. $13$

If we observe series then each term of series follow the patterns like $+3,-2,+3,-2$ and so on.

• $4+3=7$
• $7-2=5$
• $5+3=8$
• $8-2=6$
• $6+3=9$

so the next term will be
$9-2=7$

option A is correct.

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