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Look at the pyramid. The pair of adjacent cells in the bottom row add up to give the number in the corresponding top cell in the next row; and these two cells add upto give the number at the top of the pyramid. Write an algebraic expression to get the final answer. |
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Answer» Look at the pyramid. The pair of adjacent cells in the bottom row add up to give the number in the corresponding top cell in the next row; and these two cells add upto give the number at the top of the pyramid. Write an algebraic expression to get the final answer.
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