exam Maths Puzzle Numerical Ability

CAN SOMEONE PLEASE HELP ME WITH THIS??

FIND THE INTERSECTION: {3,5,7,11} {1,2,7,8,11}

FIND THE UNION: {3,9,15,18,27} {3,9,15,30}

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exam Other Question

Can someone help me on this problem?

The length of a rectangular playing field is 5 ft. less than twice its width. If the perimeter of the playing field is 230 ft., I nned to find the length and width of the field.

Thanks,
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