exam Maths Puzzle Numerical Ability

how do you find the greatest common denominator for numeric fractions, in order to reduce them?

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exam Other Question

Complete the ordered pair so that it satisfies the given equation. Match your results to the correct answer below:

2x-5y=-12 : (-1, ? )

a) (-1,0)
b) (-1,5)
c) (-1,2)
d) (-1,4)

Please help. Thank you so much. If 20 men assemble 8 cars in a day, how many men are needed to assemble 12 cars in a day?