exam Maths Puzzle Numerical Ability

this is a compound inequality:

x+2 is less or equal to 6
and
-2x is less than 10

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exam Other Question

Please help! This has me stumped. I think this is a logarithm problem.
Find the integer k such that 270k is a perfect square. how can i factorize x^4 -3x^2+2 i dont understand this sum please help