exam Maths Puzzle Numerical Ability

39. lnx+lnx^2=3
The answer is {e}, but hot did they get that?

41. logx+log(x-21)=2

The answer is {25}, but how did they get that?

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Young's rule of thumb method is used to determine the portion of an adult dose of medication to administer to a child. If A represents the age of the child
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T-Willy got 128 pounds of honey from his hive. If this was a 60 percent increase from last year, how much honey did he get last year?