exam Maths Puzzle Numerical Ability

Use the following table to answer the question.
Population of Europe by Age Groups Population (in thousands)
1950 1970 1995
Age

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sample final question...trying to study correctly for final :

solve each equation:

log (7x+8) = 2 log x

THANK U THANK U THANK U The lengths of diagonals of a rhombus are in the ratio 2:1. If the perimeter of the rhombus is 20, find the sum of the lengths of the diagonals.

I know that each side is 5. ( 20/4=5)
I know the diagonals are perpendicular to each other.