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chandi

· started a discussion

· 1 Months ago

digital root method (Question: 103847.0 )

12.4*x*16.5=2905.32 will u tell by applying digital root method

Question:
Directions: What should come in place of the question mark (?) in the following questions?

12.4 × ? × 16.5 = 2905.32

Options:
A) 13.4
B) 15.2 
C) 16.2
D) 14.2
E) None of these
Solution:

12.4 × ? × 16.5 = 2905.32

⇒ ? =  \(\frac{2905.32}{12.4\times16.5}\) = 14.2

Knowledge Expert

· commented

· 1 Months ago

828

chandi

· commented

· 1 Months ago

divide rs 2379 into 3 parts so that their amount after 2y 3y 4y respectively may be equal, the rate of interest being 5% per nnum at simple interest the first part is

Knowledge Expert

· commented

· 1 Months ago

You cannot apply digital root in this case. You can apply that when options are given. You can apply this if only one of the two operations i.e. either addition or multiplication is used in the question...
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