EXCALIBUR E108 Einstein Brain Station - Manual (Page 13)

13
5 NUMBER PUZZLES
5.1 C
ALCULATE
The display shows something like this:
The numbers in the top rows (5, 6, 7, 8
and 9) must be arranged with arithmetic
signs between them, so as to produce the
number that follows the = sign (23). In
this puzzle (on Level 4), the solution is: 9
– 8 * 5 * 6 – 7 = 23.
(Note that the operation is treated as a
pocket calculator would treat it – the
multiplications are not carried out before
the subtractions.)
You would enter this solution as follows:
(1) Use the arrow keys to bring the
cursor to the 9. When the 9 is
“blinking”, press ENTER. (The
machine performs some
calculations relevant to the scoring;
you may see a rotating “hourglass”
which asks you to ait.)
(2) Using the UP/DOWN keys, point to
the “minus” sign (in the 5th row);
when it is “blinking”, press ENTER.
(3) In the same way, using the arrow
keys and ENTER, point to the 8,
the “*” sign, the 5, the “*” sign
again, the 6, the – sign and the 7.
The selected items and the current “sub-
total” are recorded in the bottom lines.
Mistakes may be retracted with CLEAR.
On reaching the solution, press ENTER to
see your score.
5.2 T
OTALS
The display shows something like this
example (on Level 4):
The three pairs of ?? signs at the bottom
indicate that in this case you have to
select three numbers from those in the top
rows. They must add up to the number
after the = sign (186). To solve this
puzzle, you would select 41, 70 and 75.
To select a number: bring the cursor to
it, using the arrow keys. When the right
number is “blinking”, press ENTER.
The selected items and the current “sub-
total” are recorded in the bottom lines.
Mistakes may be retracted with CLEAR.
5 6 7
8 9
= 2 3
+ - * /
= 0
9 3 5 3 9 9
4 1 7 0 8
7 1 2 0 7 5
= 1 8 6
? ? + ? ? + ? ?
= 0