Peggy gazed at her sum in amazement. She differed from the answer by several figures. Could both she and Lilian have made a mistake? It seemed impossible, for Lilian was so splendid at arithmetic. But Bertha was reading out the next sum, and the next. To each answer she gave a crowd of uplifted hands agreed with her, and poor Peggy found, to her chagrin, that in every case her figures were not the same. It could not be that all the ten sums she had taken so much pains over were wrong. If so, it meant a very bad mark for arithmetic.