exam Maths Puzzle Numerical Ability

I have a problem where I have to convert 25/10 and 251/100 to decimals. For 25/10 my answer is 0.25. For 251/100 my answer is .251. I am not sure if my answers are correct.

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exam Other Question

Need help on graphing this one.

Graph the functions y=x and y = sqrt(x) on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs. Translate to an algebra statement; do not solve:
Three times the sum of a number and seven yields the same result as the twice the same number decreased by four.