Question 10
Abid’s house number has three digits. Removing its first digit gives Ben’s house number. Removing the first digit of Ben’s number gives Chiara’s number. Their three house numbers sum to 912. What is the second digit of Abid’s number?
Assume Ben’s remaining number is genuinely two-digit, so it has no leading zero. The source key relies on this convention; allowing a leading zero would create another solution.
Assume Ben’s remaining number is genuinely two-digit, so it has no leading zero. The source key relies on this convention; allowing a leading zero would create another solution.