exam Maths Puzzle Numerical Ability

I need to find the GCF for the group in the problem below, and the steps to reach the solution. Can anyone help?

6a�b, 9ab�, 15a�b�

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exam Other Question

Pete won $10 000 in a lottery. He invested his winnings, part at 10% per annum and part at 11% per annum. If the total interest earned was %1060, how much was invested at each rate? Find the equation of the line containing the point (4,1) and having a slope of -1/3. How do I solve this?