exam Maths Puzzle Numerical Ability

Hello! I am doing word problems, and I need a little help opn two of them. Everytime I see a word problem I get frustrated because I don't know what to do first. Please help.

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exam Other Question

The average of two four digit positive integers is found by placing a demimal point between the two numbers. Find the sum of the two four digit numbers. Tutor could you please help me with the following problem: x+4y=16

If both x and y are positive integers in this equation, how many different values can x have? (1,2, 3 or 4) I chose 3..am I correct?

Thank you for your help!