exam Maths Puzzle Numerical Ability

Simplify:

5- sq root 2/sq root 2

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exam Other Question

Write the equation of the line that passes through point (-2, 3) with a slope of -4. Please help with the dice problem:

a) how many outcomes are there if four distinct dice are rolled? (e.g. 2,3,5,6 on the 1st, 2nd, 3rd and 4th die and 6,5,3,2 on the 1st, 2nd, 3