In a certain code language, '752' means 'copper is strong', '276' means 'iron is strong' and '365' means 'iron and copper'. Find the code for 'and'.
Answer & explanation
Correct answer: option 2
In 1st and 2nd line strong and 7 is common hence 7 is the code of strong
In 1st and 3rd line copper and 5 is common hence its code is 5
Then the code of and is :
3