Could I just mention the grammar?
A brick WEIGHS (weighS not weigh) IT weighs...
How much DOES it weigh? Is the question form.
And the convention is that we use a dot/point NOT a comma. 1.5. One point 5
For example: 1,350, 250.25. One million, three hundred thousand, two hundred and fifty point two five.
As for the maths, I'll leave it to the others!
My initial response was 24
Well, i overlooked the fact that chicken are not able to lay 1.5 egg))
Sudeep, give me a five, i think you are a winner))