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ILE Posted 14 years ago
Vocabulary

The lock will open as long as I am within two of the correct number.

I came across this problem and I couldn't understand the meaning of the underlined sentence.
Could you please enlighten me on that?

"I have a lock (with password numbered from 1 through 60) for which I do not remember the combination. However, since it is so old the customer service hotline said the lock will open as long as I am within two of the correct number. How many combinations do I need to test in order to open the lock?"

Any help would be much appreciated and thanks.

Isabelle
  

Top answer

Hi, eg Within two of the number 7 are the numbers 5 / 6 / 8 / 9. Clive

— Clive

  • Hi, eg Within two of the number 7 are the numbers 5 / 6 / 8 / 9.
  • Clive
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4 Answers
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Hi,

eg Within two of the number 7 are the numbers 5 / 6 / 8 / 9.

Clive
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Clive,

You're so right! So testing the numbers 3 and 8, it will cover the range from 1 to 10 and so on...
Thanks!
You're very helpful and incredibly amazing!
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Hi,

You're welcome.

I'm not sure if 'the number' in your instructions refers to each digit,

or to the whole number (eg 317 referring to 315 / 316 / 318 / 319 ).

Clive
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CliveI'm not sure if 'the number' in your instructions refers to each digit,
or to the whole number (eg 317 referring to 315 / 316 / 318 / 319 ).
Wow, you made a really good point and this gives me a new insight on how to approach the problem (or at least to ask for clarification before starting to solve the
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