solves the question yet the checker returns not a valid answer.
the following 4 lines solve this question
yet the online checker returns not a valid answer
Who invented zero?
Sum the numbers on the main diagonal
Calculate volume of box
Determine given vector is even or odd
Please check if calorie intake is less than 300 kcal.
The great 82-year-old
Let's make puddings !
Please check the last row
The proportion of NaN in the data
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