Jarek multiplies a number by 3 and gets an answer of 90 . If instead, he divides the number by 3 , what answer does he get?
(A) 5
(B) 10
(C) 30
(D) 60
(E) 270
Since Jarek multiplies a number by 3 and gets an answer of 90 , then the number must be $\frac{90}{3}=30$. (We may check that $30 \times 3=90$.)

If Jarek instead divides the number 30 by 3, then the answer he gets is $\frac{30}{3}=10$.

ANSWER: (B)

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