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Problem 366

Number theory Difficulty 2.0 Find the answer UKMT Senior Mathematical Challenge · United Kingdom · 2024

$p$ , $q$ , $r$ and $s$ are two-digit primes which between them use all the non-zero digits except 5. What is the value of $p+q+r+s$ ?

(A) $220$ (B) $210$ (C) $200$ (D) $190$ (E) more information needed

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