book Maths Puzzle Numerical Ability

Planes A and B intersect, and planes B and C intersect, but planes A and C do not intersect.

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book Other Question

Rationalize the Denominator

"variable a" divided by the cubic root of 4. (1) lizzie had two amounts of pens. the product of these 2 amounts proved to be 126. one factor is 3 greater than 3 times the other. what are the 2 amounts of pens she has?