exam Maths Puzzle Numerical Ability

k(3k-1)(k-4)

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exam Other Question

use operation symbols, parentheses, and the numbers 1,2,3, and 4 to express the numbers from 1 to 15. for examp;e,
2+3-(4x1)=1.
Find all the points of intersection of the curves x^2+y^2=4 and x+y=2