Question

Amelia is trying to solve a puzzle. The puzzle is finding an unknown number from the given clues.
1. The number is a four-digit number.
2. The digit at the thousands place is the largest one-digit number.
3. The digit at the ones place is the smallest one-digit number.
4. The digit at the tens place is double the value of the digit at the hundreds place.

• A. 9024
• B. 9240
• C. 2490
• D. 4209

Answer 1

The correct option is B 9240

The given clues are:

The number is a four-digit number.

The digit at the thousands place is the largest one-digit number.

Hence, the digit at the thousands place is 9.

The digit at the ones place is the smallest one-digit number.

Hence, the digit at the ones place is 0.

The digit at the tens place is double the value of the digit at the hundreds place.

The remaining digits are 2 and 4.

Here, 4 is the double of 2.

Hence, the digit in the tens place is 4.

The remaining digit is 2. It should be in the hundreds place.


Hence, the required number is 9240.