Class 12
Dear student.
Greetings.
Since you are short on time, the best you can do is studying the chapters which you know something about deeply any try to score maximum marks in those chapters. Study as much as you can as it is your last chance. Don't waste a single day.
20.
The sequence is
2+3=5 and 2*3=6
3+4=7 and 3*4=12
So next comes
4+5=9 and thus 4×5=20.
I hope this'll help
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