© Juliet & Charles Snape 2009
Max: 5 x 2 x 5 x 3 x 1 = 150,
Stella: 200 ÷ 2 ÷ 5 ÷ 1 ÷ 4 = 5,
Boris: 10 + 100 + 5 + 25 + 60 = 200,
Natasha: 150 – 100 – 5 – 15 – 20 = 10.


Page 12 and 13/Code cracking graphs

Letters in order of frequency
e t a o i n s h r d l c u u m w f g y p b v k j x q z

Tally
Page 14 and 15/Are you puzzled?

1. Spy search

Changes are (clockwise from window): (1) the window has been opened, (2) pillow thrown to floor,
(3) sheet turned back, (4) book on chair closed, (5) one slipper moved, (6) letter from case is on floor,
(7) sock in case moved, (8) key moved down, (9) TV remote on floor, (10) lamp shade moved,
and (11) the clock time has moved on 1 hour.

2. Spy buy
The bottle of ink costs £1.25 and the pen costs 25p; this makes exactly £1.00 difference between
the two items.

3. When is the spy's birthday?
The spy’s birthday is on 26th February (there are only 28 days in the month displayed).

(1) deletes 3, 5, 6, 9, 10, 12, 15, 18, 20, 21, 24, 25, 27
(2) deletes 2, 7, 11, 13, 17, 19, 23
(3) deletes 1, 8, 22
(4) deletes 4, 14, 16, 28

4. Safe cracker
5. Spies on bikes
8 spies came on tricycles.

6. Spy count
The spy has four different poses.
There are most of D (9). There are 8 each of A, B, and C.


Page 16 (back cover)/Spy school
36 pupils attended the 'Spy School' event.

The first groups were:
By using a common denominator, twelfths, we can work out that the first three groups had three quarters
of the pupils.
Volume 14

CIRCA 41: Solutions

Front cover/Find the key:
The The message on the wheel reads
‘THE KEY IS UNDER THE POT’.

The 10 keys can be found:
1. in the gutter,
2. under the cat,
3. above the door,
4. in the spy’s hat,
5. on top of wall,
6. behind drain pipe,
7. on ladder,
8. in bin,
9. under newspaper,
10. under flowerpot.













Pages 2 and 3/Codes and ciphers

Semaphore
The girl's flags give the message: TIRED ARMS

Know your codes quiz
(1) S, (2) D, (3) E, (4) C, (5) O
The correct answers in the boxes spell CODES.

Shhh... Top Secret
The plain text reads: MEET AT SHOP

The Caesar Code
The plain text reads: BE READY TO ATTACK

Pages 4 and 5/
Shifty secrets
The spies' cards reveal that they come from the following countries:

1. SPAIN, 2. HOLLAND, 3. AUSTRALIA, 4. PORTUGAL, 5. NORWAY, 6. PERU


Pages 6 and 7/Mary's mystery
The pangram in the picture gives the full substitute alphabet using pig-pen (see page 14 of the
magazine).

The enciphered messages read in plain text:

Gravestone: YOUR FATHER IS ALIVE AND LIVING IN AMERICA

Letter: NO BONES LIE UNDER THE STONE
ONLY WHAT WE RIGHTFULLY OWN


Page 8 and 9/Get cracking
A is 3, B is 5, C is 8, D is 12, E is 12, F is 17, and G is 21.

The 'Code Finder' will give the letters IENSGOP. When these are re-arranged they spell PIGEONS.

Question B: spatially-aware children may notice that there is an alternative combination of three shapes that will make a square (it’s not one of the choices). It is a, c and d.


Page 10 and 11/
Operation: Maths

Message from Eta
meet me at ten, from eta

Message from Sam
no, it is past my bedtime, from sam

Eye alphabet
So, a quarter or 9 pupils attended ‘Disguise Yourself’. Therefore, 9 x 4 = 36.

TOP.