exam Maths Puzzle Numerical Ability

Solve
-0.4x < -24
How do i do this one???

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exam Other Question

I have to combine if possible no calculator or table of roots to be used...Can you help me please? Thanks...:)

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Number 20

6square5y - square root 20y Evaluate. 8 + 2 � 5 - 24 � 6 � 2