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If '+' means ' ÷ ' , ' − ' means '+', ...

If '+' means ' ÷ ' , ' − ' means '+', ' × ' means '-' and ' ÷ ' means ' ×' then `50 + 5 xx 100 - 2 div 40 xx 250` = ?

A

-260

B

125

C

500

D

0

Text Solution

Verified by Experts

The correct Answer is:
A

According to the question
(i)` 50 + 10= 500.` But actually `50 xx 10 = 500`
So, .+. means `.xx.`
(ii) `20 - 4 = 50` But, actually `200 div 4 = 50` So, .-. means `.div.`
(iii) `75 xx 5 = 70` But, actually `75 - 5 = 70 So, .xx.` means .-.
(iv) `25 div 10 = 35` But, actually `25 + 10 = 35 So, .+.` means .+.
The given expression is `50 + 5 xx 100 - 2 div 50 xx 250`
Using the proper signs, we get
`50 xx 5 - 100 div 2 + 50 - 250`
Using BODMAS RULE, we get
`50 xx 5 - 50 + 50 - 250 = 250 - 50 + 50 - 250 = 300 - 50 - 250 = 300 - 300 =0`
Therefore, the value of the given expression = 0
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LUCENT PUBLICATION-MATHEMATICAL OPERATIONS -EXERCISE-3
  1. If '+' means ' ÷ ' , ' − ' means '+', ' × ' means '-' and ' ÷ ' ...

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  2. In each of the following questions, the given equation becomes correct...

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  3. In each of the following questions, the given equation becomes correct...

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  4. In each of the following questions, the given equation becomes correct...

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  5. In each of the following questions, the given equation becomes correct...

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  6. In each of the following questions, the given equation becomes correct...

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  7. In each of the following questions, the given equation becomes correct...

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  8. In each of the following questions, if the given interchanges are made...

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  9. In each of the following questions, if the given interchanges are made...

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  10. In each of the following questions, if the given interchanges are made...

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  11. In each of the following questions, if the given interchanges are made...

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  12. In each of the following questions, the two expressions on either side...

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  13. In each of the following questions, the two expressions on either side...

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  14. In each of the following questions, the two expressions on either side...

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  15. In each of the following questions, the two expressions on either side...

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  16. In each of the following questions, the two expressions on either side...

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  17. In each of the following questons , which one of the four interchanges...

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  18. In each of the following questons , which one of the four interchanges...

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  19. In each of the following questons , which one of the four interchanges...

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  20. In each of the following questons , which one of the four interchanges...

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  21. In the following questions , the equations have become wrong because o...

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