7.一个数除以6商是56,余数是5,这个数是( )
| A. | 336 | B. | 341 | C. | 280 |
6.下面各数被5除余数都为0的一组是( )
| A. | 98,45,301 | B. | 39,48,52 | C. | 440,985,55 |
20.下面图形中,周长相等的两个图形是( )

0 127048 127056 127062 127066 127072 127074 127078 127084 127086 127092 127098 127102 127104 127108 127114 127116 127122 127126 127128 127132 127134 127138 127140 127142 127143 127144 127146 127147 127148 127150 127152 127156 127158 127162 127164 127168 127174 127176 127182 127186 127188 127192 127198 127204 127206 127212 127216 127218 127224 127228 127234 127242 199269
| A. | ①② | B. | ①③ | C. | ②③ |