book Maths Puzzle Numerical Ability

The perimeter of a rectangle is 56 in. the length is 5 less thean the width. Find the demensions.

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book Other Question

at work, Jack must stuff 1000 envelopes w/ advertisements. He can stuff 12 envelopes in one minute, and he has 112 envelopes already finished. Solve 1000 = 12n + 112 to find how many minutes it will take jack to complete the task Dr. Mento has a class of 80 students. For a group project, she wants to divide the students into groups of 6, 8, or 10. Is this possible? Explain your answer.