exam Maths Puzzle Numerical Ability

The second of three numbers is 1 less than the first. The third number is 5 less than the second. If the first number is twice as large as the third, Find the three numbers.

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exam Other Question
(8a^5-6a^3)+(5a^5+9a^3) Please help me find the solution to this circumcenter problem. Find the coordinates of the circumcenter of Triangle ABC A(-2,2), B (3,1), C(-3,-1)