Problem
NT-B1-M01-P001 Checking Exact Divisibility
#1
★☆☆☆☆ Level 1 of 5
Determine which statements are true: \(9\mid 153\), \(11\mid 154\), \(13\mid 221\). Briefly justify your answer.
Write each number either as divisor times an integer or as divisor times an integer plus a remainder.
\(153=9\cdot17\), so \(9\mid153\). \(154=11\cdot14\), so \(11\mid154\). \(221=13\cdot17\), so \(13\mid221\). All three statements are true.
Opening problem on the definition of divisibility.