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
4vir4ik [10]
2 years ago
14

how many 3 digit positive numbers have their hundreds, tens, and units digits in strictly ascending order

Mathematics
1 answer:
zaharov [31]2 years ago
6 0

There are seven 3 digit positive numbers that have their hundreds, tens, and units digits in strictly ascending order

Since the hundreds, tens, and units digits are in strictly ascending order.

Let the digit in hundreds place be n, since its is strictly ascending order, the digit in the tens place is n + 1 and the digit in the units place is n + 2.

So, the digits are n, n + 1, n + 2.

<h3>The positive 3 digit numbers</h3>

So, starting with n = 1, we find the number of 3 digit positive integers in ascending order.

<h3>So, when n = 1,</h3>

n, n + 1, n + 2.

1, 1 + 1, 1 + 2.

1, 2, 3

So, the first number is 123

<h3>So, when n = 2,</h3>

n, n + 1, n + 2.

2, 2 + 1, 2 + 2.

2, 3, 4

So, the second number is 234

<h3>So, when n = 3,</h3>

n, n + 1, n + 2.

3, 3 + 1, 3 + 2.

3, 4, 5

So, the third number is 345

<h3>So, when n = 4,</h3>

n, n + 1, n + 2.

4, 4 + 1, 4 + 2.

4, 5, 6

So, the fourth number is 456

<h3>So, when n = 5,</h3>

n, n + 1, n + 2.

5, 5 + 1, 5 + 2.

5, 6, 7

So, the fifth number is 567

<h3>So, when n = 6,</h3>

n, n + 1, n + 2.

6, 6 + 1, 6 + 2.

6, 7, 8

So, the sixth number is 678

<h3>When n = 7,</h3>

n, n + 1, n + 2.

7, 7 + 1, 7 + 2.

7, 8, 9

So, the seventh number is 789

<h3>When n = 8,</h3>

n, n + 1, n + 2.

8, 8 + 1, 8 + 2.

8, 9, 10

Since we cannot have 10 in the last digit, we ignore this number.

<h3>The 3 digit positive numbers</h3>

So, the numbers are 123, 234, 345, 456, 567, 678, and 789

So, there are seven 3 digit positive numbers that have their hundreds, tens, and units digits in strictly ascending order

Learn more about positive numbers here:

brainly.com/question/23270521

You might be interested in
Pythagorean triples are given by the formulas x2 - y2, 2xy, and x2 + y2. Use the formulas for the Pythagorean triples to prove w
Arte-miy333 [17]
Let k be an integer. Suppose there is a triangle with legs of length 16 and 2k+1. Then by the Pythagorean theorem, the length of the hypotenuse should be

\sqrt{16^2+(2k+1)^2}=\sqrt{4k^2+4k+257}

The formulas for Pythagorean triples say that if the legs are integers, then so must be the hypotenuse, because if x=16 and y=2k+1 are integers, then so are x^2-y^2, 2xy, and x^2+y^2.

However, 4k^2+4k+257 is not a perfect square trinomial, which means for any integer k, the length of the hypotenuse is not an integer, so such a triangle doesn't exist.
4 0
3 years ago
Points y,B, and Q are shown on the coordinate plain. If Y,B and Q are the vertices of a triangle what is the perimeter to the ne
Nataly [62]

Answer: sqrt(61)

Step-by-step explanation:

For parts a) and c1), refer to the attached picture.

For part b), the distance formula is:

d = sqrt[(x2 - x1)^2 + (y2 - y1)^2]

Using x1 = -1, y1 = -4, x2 = -6, y2 = 2:

d = sqrt[(-6 + 1)^2 + (2 + 4)^2] = sqrt[25 + 36] = sqrt(61)

Part c2) Another way to find the length of AB without using the distance formula is by drawing the line and measuring it according to the scale.

Part d) This will only work as long as the graph paper is accurately made, and the scale computation is done correctly. However, this will only give approximations, and will not give an exact answer when radicals are involved.

8 0
3 years ago
Sarah has a photography blog.3/7 of her photos are of nature. 1/4 of the rest are her friends. What fraction of all of seeress p
strojnjashka [21]
The answer is 8/28 of the number they both have
7 0
2 years ago
Read 2 more answers
There are 18 players on the baseball team. Of these players 1/3 are girls. How many girls play on the baseball team?
Doss [256]
6 girls on the basketball team
6 0
3 years ago
Read 2 more answers
Find the soultion 3/5+2/5=
rjkz [21]

Answer:

The answer would be 5/5 or 1

Step-by-step explanation:

since they have the same denominator the its pretty simple add the numerators(the top numbers) together to get 5/5 or 1 whole.

4 0
2 years ago
Read 2 more answers
Other questions:
  • Will give brainliest!!
    10·1 answer
  • the perimeter of a rectangular garden is 360 m. if the width of the garden is 85 m, what is it's length?​
    6·2 answers
  • What is the sequence steps of finding the median?
    5·1 answer
  • △DEF
    15·2 answers
  • 39545 rounded to the nearest thousand
    9·2 answers
  • What is the value of x to the nearest tenth? <br><br> 12.0<br><br> 7.2<br><br> 4.8<br><br> 9.2
    11·2 answers
  • • What Were the Headlines After a 3 Foot 10 Inch Fortuneteller
    10·1 answer
  • Solve the equation <br><br> 5x-(2x-13)=40
    9·2 answers
  • PLEASE HELP ME! ALSO PLEASE EXPLAIN!
    9·1 answer
  • A 20-ft flagpole casts a shadow of 12 feet long. How tall is a nearby building that casts a shadow of 20 feet long? Round to one
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!