please explain in detail

A

archana.ved

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A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 98 are wrong and the other digits are correct, then the correct answer would be ??

[A]. 553681.

[TD="class: bix-td-option, width: 49%"]555181[/TD]
[TR]
[TD="class: bix-td-option, width: 1%"][C]. [/TD]
[TD="class: bix-td-option, width: 49%"]
555681
accept.png
[/TD]
[TD="class: bix-td-option, width: 1%"][D]. [/TD]
[TD="class: bix-td-option, width: 49%"]556581[/TD]
[/TR]

Answer: Option C




but how it comes
please reply

 
archana.ved said:
A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 98 are wrong and the other digits are correct, then the correct answer would be ??

[A].553681.

[TD="class: bix-td-option, width: 49%"]555181[/TD]
[TR]
[TD="class: bix-td-option, width: 1%"][C].[/TD]
[TD="class: bix-td-option, width: 49%"]
555681
accept.png
[/TD]
[TD="class: bix-td-option"][D].[/TD]
[TD="class: bix-td-option"]556581[/TD]
[/TR]


Answer: Option C

but how it comes
Click to expand...


Hello archana.ved: Welcome to the boards!

This is a tutoring web site; we request that you explain what you have already tried or thought about, in this exercise.

Please read the summary page of our posting guidelines, before posting again.

Also, please clarify the phrase highlighted in red above; there is only one 98 in the answer.

Are these the two 98s ?

"A boy multiplied 987 by a certain number and obtained 559981 as his answer."

Thank you. :cool:
 
To me this question reads either as the first two digits are correct and the last is correct.

Or, the first three digits are correct and the last digits is correct.

In which case either all the answers are correct or all the answers are wrong?

I'll leave it up to you to determine which case applies to each situation.

Question needs clarification.
 
hello

and sorry

as I came across this question through a book where even all the step are given, I am no able to get it
question is

A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:


A.553681
B.555181
C.555681D.556581



Answer: Option C

Explanation:


987 = 3 x 7 x 47

So, the required number must be divisible by each one of 3, 7, 47
553681
1-sym-arr.gif
(Sum of digits = 28, not divisible by 3)

555181
1-sym-arr.gif
(Sum of digits = 25, not divisible by 3)

555681 is divisible by 3, 7, 47.



what is idea behind
987 = 3 x 7 x 47


is LCM calculated or prime numbers are considered
please explain

or what I should think before solving
 
hello


as i came across this question through a book where explanation is also given still i am not able o get it

question is
A boy multiplied 987 by a certain number and obtained 559981 as his answer. If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:

A. 553681 B. 555181
C. 555681 D. 556581

Answer: Option C
Explanation:
987 = 3 x 7 x 47
So, the required number must be divisible by each one of 3, 7, 47
553681 (Sum of digits = 28, not divisible by 3)
555181 (Sum of digits = 25, not divisible by 3)
555681 is divisible by 3, 7, 47.

What should I think before solving
987 = 3 x 7 x 47
Is this lcm or related with prime numbers
Can anybody explain
 
Thanks for your reply
The way they asked the question
“If in the answer both 9 are wrong and the other digits are correct, then the correct answer would be:”
I realy got confused …
I was unable to CONCLUDE the question …:(
 
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