What is the total number of positive 4-digit numbers that start with an odd digit and finish with an even digit?

Answer Choices

Correct answer marked below

200

400

1,600

2,500

Correct

4,000

See the full step-by-step explanation

You can see the correct answer above. Sign in for free to unlock the complete worked solution.

Track your performance and improve

Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.

Start for free Sign in

Explanation

Preview

Official Explanation

Official

To find the number of positive 4-digit numbers that start with an odd digit and end with an even digit, we first identify the possible digits. The odd digits are 1, 3, 5, 7, and 9, giving us 5 choices for the first digit. The last digit can be any even digit: 0, 2, 4,…

Read the full explanation

Create free account Sign in

Comments

RyanApr 28, 2025

Tricky wording but good practice

rijulMar 15, 2024

greatt question!

What this question tests

What it tests

Whether you can count arrangements and selections correctly — permutations vs. combinations.

Common trap

Overcounting: treating a selection as ordered when order does not matter, or forgetting to divide by duplicates.