Waste less time on Facebook — follow Brilliant.
×

Please help!!-2

You have a safe and the password of which can be a number of 1-10 digits. If you have the digits 0-9, How many possible passwords can you make?

Note:- 1)Please remember that the safe can accept any number of 1 to 10 digits.

2)You can leave your answer in a factorial or exponential form. No need for the absolute value

Note by Mehul Arora
2 years, 11 months ago

No vote yet
1 vote

  Easy Math Editor

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 \( 2 \times 3 \)
2^{34} \( 2^{34} \)
a_{i-1} \( a_{i-1} \)
\frac{2}{3} \( \frac{2}{3} \)
\sqrt{2} \( \sqrt{2} \)
\sum_{i=1}^3 \( \sum_{i=1}^3 \)
\sin \theta \( \sin \theta \)
\boxed{123} \( \boxed{123} \)

Comments

Sort by:

Top Newest

10^10 + 10^9 + 10^8......

Mohamed Ashraf Mostafa - 2 years, 11 months ago

Log in to reply

Yeah! Thanks!

Mehul Arora - 2 years, 11 months ago

Log in to reply

\(10^{10}\)

Marc Vince Casimiro - 2 years, 11 months ago

Log in to reply

How can you say that? Please provide a full explaination @Marc Vince Casimiro

Mehul Arora - 2 years, 11 months ago

Log in to reply

Hmm... I didn't notice in the question that they can be \(1-10\) digits, my answer was for \(10\)-digit password. But, well, for \(10\)-digit password, you have \(10\) choices for the first digit while on the succeeding digits, you can still repeat the digits so the answer is not \(10!\) but \[10\times10\times10\times10\times10\times10\times10\times10\times10\times10 = 10^{10}\]

Marc Vince Casimiro - 2 years, 11 months ago

Log in to reply

@Marc Vince Casimiro It would have been more helpful if you answered the REAL question. But still thanks for the little piece of information you gave me!!

Mehul Arora - 2 years, 11 months ago

Log in to reply

×

Problem Loading...

Note Loading...

Set Loading...