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SASMO 2027 · Grades 4-5 · SET 002 · Self-study Question 3

SASMO · SASMO 2027 · Grades 4-5 · SET 002 · Self-study

Question 3

If $a!b=(a+b)\div2$, calculate $15!(4!6)$. Here ! denotes this new binary operation, not a factorial.

Question illustration

Enter the numerical answer only.