Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Ventricate

For how many two- digit positive numbers will tripling the tens digit give us a two-digit number that is triple the original number?

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. TransendentialPI
    Best Response
    You've already chosen the best response.
    Medals 1

    I set this up as 10*a+b represents a 2 digit number (a needs to be multiplied by 10 because of the tens place. So If we triple the tens digit 3*10a + b or 30a+b = the new number with the 10's digit tripled so 30a+b = 3(10a+b) solved 30a+b = 30a + 3 b b = 3b 0=b this means a can be any digit as long as b = 0 10 * 3 = 30 20 * 3 = 60 30* 3 = 90 but 40 * 3 = 120, we no longer have a 2 digit number. I'm thinking 3 numbers is the answer. This discussion is out here also: http://www.takegmat.com/index.php/gmat-question-of-the-day-number-theory/

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.