exam Maths Puzzle Numerical Ability

The present age of a father exceeds 3 times the present age of his son by 2 years. Six years ago, the age of the father exceeded 4 times the age of the son by 4 years. Find the present ages of the son and the father.

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exam Other Question
I have hourglass figure. Total h=10. Upper cone radius=3. Lower cone radius=5 Find Volume in need of help with solving this system: {x^2-100y^2=100
{x^2+ y^2=100
thanks for the help.