book Maths Puzzle Numerical Ability

FIND LCM (100, 14, 20,)

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book Other Question

How would you write an equation of a graph that models the situations?
a) the path of a satellite in orbit at a distance of 19 000km from the centre of earth.
b)the path of a poi two numbers differ by 18. Four times the smaller is 57 more than the larger. Find the numbers.