exam Maths Puzzle Numerical Ability

simplify 4x(3x2 + 2x + 1)

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exam Other Question

Solve {x=8-2Y amd 8y+3=6x Can someone help me with this problem?

I need to find the first and third quartiles, Q1 and Q3, of the following set of numbers:

0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27

Thanks,
Sher