The weights of 3 boxes are 4, 5 & 11 kilograms. Which of the following CANNOT be the total weight, in kilograms, of any combination of these boxes?
17
1) 20 → (4 + 5 + 11) = 20
2) 16 → (11 + 5) = 16
3) 17 → This CANNOT be the total weight, in kilograms, of any combination of these boxes.
4) 15 → (11 + 4) = 15
Hence, ‘17’ is the correct answer.
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5 years ago, father’s age was 8 times Rohan’s age. 5 years hence, the ratio of father’s age to Rohan’s age will be 10 : 3. What is Rohan’s present age?