243. An old Jew took a diamond cross to a jeweller to have the
diamonds re-set, and fearing that the jeweller might be dishonest
he counted the diamonds, and found that they numbered 7 in three
different ways. Now, the jeweller stole two diamonds, but arranged
the remainder so that they counted 7 each way as before. How was it
done?
7
6
7 6 5 6 7
4
3
2
1
244. A person wishing to enclose a piece of ground with palisades
found that if he set them a foot apart that he should have too few by
150, but if he set them a yard apart he should have too many by 70.
How many had he?
245. A mechanic is hired for 60 days on consideration that for each
day he works he shall receive 7s. 6d., but for each day he is idle he
shall pay 2s. 6d. for his board, and at the end he receives £6. How
many days did he work?