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• 12 Four equal circles intersect: What is the area of the small shaded portion and its height
• 7 Does $\triangle ABC$ exist such that $\triangle ABC \sim \triangle DEF$, with $D, E, F$ being the incentre, centroid, orthocentre of $\triangle ABC$?
• 5 Numerical example for $\gcd(a,b)=\prod p_i^{\min(a_i,b_i)}$
• 5 PMF of throwing a die 4 times
• 5 What is the value of $a + b$ if $a\sqrt{b} = BC$ in right triangle $\Delta ABC$?
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