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#164 Sum thing wrong

Amira presented her homework to her teacher:

2 7 9 7

+ 2 3 6 7

= 4 6 5 4

Wrong, Amira, please check your working.

鈥淚 promise you it is right. It is just that I have used a code. Every digit used represents a different digit, and the same digit is always represented by the same 鈥榳rong鈥� digit. For example, maybe I replaced all the 6s with 4s. Or maybe I did something else鈥�

鈥淵ou are giving me a headache, Amira鈥�.

What is the correct sum?

Solution next week

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Answers below

#163 Down for the count

Solution

The contestants managed to get the answers 1, 2, 5 and 9. Here are possible routes to those numbers.

(((100,000 + 10,000) 梅 1000) 鈥� 100) 梅 10 = 1

((100,000 梅 10,000) + (1000 梅 100)) 梅 10 = 2

10,000 梅 (10 脳 ((100,000 梅 1000) + 100)) = 5

10 鈥� (100,000 脳 100) 梅 (10,000 脳 1000) = 9