1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kumpel [21]
2 years ago
13

How many positive 3-digit numbers have property that the first digit is at least three times the second digit?

Mathematics
1 answer:
ss7ja [257]2 years ago
3 0

The number of positive 3-digit numbers have a property that the first digit is at least three times the second digit is 285.

<h3>How to get the number?</h3>

Since restriction is set to the first digit, all you have to think is about the last two digits e.g if the first digit is one, the last two digits can only be zeros.

Thus, by the principle of multiplication, 1×1=1 way. If the first digit is 2, then the last digits can be either 1 or 0. You have 2×2=4 ways

For first digit 3, the last two digits can be 0,1 or 2. 3x3=9, there is a succinct pattern. Therefore, 1+4+9+16+25+36+49+64+81=285.

Learn more about numbers on:

brainly.com/question/251701

#SPJ1

You might be interested in
2. Find the value of root4 (81)-2​
arlik [135]
<h2>Answer: <u><em>1</em></u></h2>

<u />

Step-by-step explanation:

\sqrt[4]{81} -2\\=3-2 \\=1

6 0
2 years ago
Read 2 more answers
Which is grater -12.5 or -10.5<br><br> Please help me
DochEvi [55]

Answer:

-10.5

Step-by-step explanation:

Greater a negative number the smaller it is.

7 0
3 years ago
Read 2 more answers
Please help! Question below
Marysya12 [62]
152... cuz 28 is perpendicular so... 180-28
5 0
3 years ago
PLZZ HELP FAST
podryga [215]

Answer:

Plot 1 - length of newborn kittens

Plot 2 - length of full-grown cats

5 0
3 years ago
Read 2 more answers
Sally consumed 2.5 gallons of water in one day. How many milliliters are equal to 2.5 gallons, if 1 liter = 1,000 milliliters an
kozerog [31]
The answer is 9462.5ml.
6 0
2 years ago
Other questions:
  • Juan is on his school's archery team. In a match, he gets 12 arrows to shoot at a target. He gets 8 points if the arrow hits the
    7·1 answer
  • Is it possible to determine the form factor without opening the case?
    9·1 answer
  • What is the first step when you simplify 5(square root symbol)164
    11·1 answer
  • Daniel has read 180 pages this is 80% of the entire book how long is the book
    9·2 answers
  • 42 = -7 ( Z - 3 )<br> Z =?
    12·1 answer
  • Geometry matching help
    10·1 answer
  • Plz help me out in that because i don’t what is the value of 5n+9+n
    6·1 answer
  • kara opened a savings account with $8,000. she makes no changes to this account after 2 years. her account has a compound intere
    7·1 answer
  • Look at image please help me ASAP
    12·1 answer
  • I'm stuck, can any one help me please?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!