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
Does anyone know how to do this, i’ll give you brainliest and there’s 16 points
leva [86]

6y-4=4y+2

2y=6, so y=3.

Plugging it in, you get that AC equals 4*3+2=14.

This is an isosceles triangle.


6 0
3 years ago
jayce runs 2 1/2 miles on monday. Each day after that, he runs the same 1 1/3 mile route every morning. His goal is to run at le
PtichkaEL [24]

Answer:

Step-by-step explanation:

6 < 2 1/2 + 1 1/3R

3 0
2 years ago
Graph the inequality y&gt;x-2
Anna35 [415]

Answer: 2

Step-by-step explanation:

8 0
3 years ago
A taxi charges a flat rate of $1.75, plus an additional $0.65 per mile. If Erica has at most $10.20 to spend on a
JulijaS [17]

Answer:13 miles

Step-by-step explanation:10.20-1.75=8.45÷0.65=13

8 0
2 years ago
What measure is equivalent to 65 killograms?
Nataly [62]

Answer:

65,000 g is equivalent to 65 kilograms

7 0
3 years ago
Other questions:
  • sweet T has 2 orange picks for every 5 green.If there are 21 picks in all,How many picks are orange?
    12·2 answers
  • The area of the following equilateral triangle is 62.4 square feet that is he height
    15·1 answer
  • When completed full a cube shaped container will hold 8000 cubic centimeter of water what is the length of an edge of the contai
    7·1 answer
  • I need this answered desprately!!
    8·1 answer
  • If the length of the legs of a right triangle are 18 and 34, what is the length of the hypotenuse? Round your
    6·2 answers
  • At most, 47 passengers can sit on a bus. There are already 29 passengers seated on the bus. The inequality p+ 29 less than or eq
    13·1 answer
  • The perimeter of a triangular sail is 44 feet. One side of the sail measures 18 feet and the second side measures 11 feet. What
    13·1 answer
  • Multiply. Express your answer in simplest form.
    15·2 answers
  • Hello good day <br>can you help me please:(​
    14·1 answer
  • Don’t know how to solve.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!