Math, asked by subhadarshan18, 10 months ago

next no.. in series. 321:9::512:15::841:40::751:?

Answers

Answered by rajeshjangra9876

1

Answer:

42

Step-by-step explanation:

3*2+ 3*1=9

5*1 +5*2=15

8*4+8*1=40

7*1+7*5=42

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