MathDB
Integral Base b

Source:

March 3, 2010
calculusintegration

Problem Statement

The number 121b 121_b, written in the integral base b b, is the square of an integer, for (A)\ b \equal{} 10,\text{ only} \qquad (B)\ b \equal{} 10 \text{ and } b \equal{} 5, \text{ only} \qquad (C)\ 2 \leq b \leq 10 \qquad (D)\ b > 2 \qquad (E)\ \text{no value of }b