Elitmus Exam

if w and x are odd numbers and y and z is even then 1/8[(w^2+x^2)*(y^2+z^2) is
option
1. always even
2. always odd
3. even or odd
4. can be fractional

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Elitmus Other Question

ERD
*AIR
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UDAR
CAOY
DORO
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DEEPER
did some body solved that question in today's ph test in which there was a square piece of 30cm and was cut from 4 corners equaly to form a box. find the volume of the box?? what is the answer?