42 Arithmetic & Algebraic Problems
- THE EIGHT CARDS
Colonel Crackham placed eight
numbered cards on the breakfast
table, as here shown, and asked his
young friends to rearrange them,
moving as few as possible, so that
the two columns should add up alike.
Can it be done?- FIND THE NUMBERS
Can you find two numbers composed only of ones which give the same
result by addition and multiplication? Of course 1 and 11 are very near, but
they will not quite do, because added they make 12, and multiplied they make
onlyll.
141. MULTIPLYING THE NINE DIGITS
They were discussing mental problems at the Crackhams' breakfast table
when George suddenly asked his sister Dora to multiply as quickly as possible
IX2X3X4X5X6X7X8X9XQ
How long would it have taken the reader?- CURIOUS MULTIPLICAND
Readers who remember the Ribbon Problem No. 83 in The Canterbury
Puzzles, may be glad to have this slightly easier variation of it: