Question

Use all the six numerals 4, 5, 6, 7, 8 and 9 to form two 3-digit even numbers whose sum is smallest, and what is the sum? ​

Answer 1

9514 1404 393

Answer:

476 +598 = 1074

Explanation:

In order for the sum to be smallest, the two most-significant digits must be the smallest possible. That is, they must be 4 and 5.

The two least-significant digits must be even. The remaining even digits are 6 and 8. Then the tens digits are the digits left over: 7 and 9.

Possible sums are ...

476 +598 = 1074

478 +596 = 1074

496 +578 = 1074

498 +576 = 1074

The sum is 1074.