What is the three-digit number formed by the digits 4, 9, and 2 in that order?

What is the three-digit number formed by the digits 4, 9, and 2 in that order?

• A. 249
• B. 492
• C. 949
• D. 4-9-2

Answer: (B)

The key idea is place value: in a three-digit number, the first digit is in the hundreds place, the second in the tens, and the third in the ones. With the digits given in that order, 4 goes in the hundreds place, 9 in the tens, and 2 in the ones. So you’re really building 400 + 90 + 2, which equals 492. That’s why 492 is the number formed by those digits in that order. The other options reflect different orders or representations (for example, 249 rearranges the digits, and 4-9-2 is just a hyphenated listing, not the standard way to write a number).

The key idea is place value: in a three-digit number, the first digit is in the hundreds place, the second in the tens, and the third in the ones. With the digits given in that order, 4 goes in the hundreds place, 9 in the tens, and 2 in the ones. So you’re really building 400 + 90 + 2, which equals 492. That’s why 492 is the number formed by those digits in that order. The other options reflect different orders or representations (for example, 249 rearranges the digits, and 4-9-2 is just a hyphenated listing, not the standard way to write a number).