1.

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.

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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