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UKMT Senior Mathematical Challenge, 2024

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

The diagram shows a partially completed number pyramid. When correctly completed, the number on any brick above the bottom row should be the sum of the two numbers on the two bricks on which it rests. What number should appear on the brick marked ' $z$ '?

(A) $176$ (B) $617$ (C) $671$ (D) $716$ (E) $761$

Figure for this problem

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