# ICCT

##### Quoc Tran Anh Le Coodinator

10/08/2018 at 03:30Maciej carries a bookmark with this table on it to help him remember his secret four digit number. If his secret number is 8526, all he has to do is to remember the words HELP. To retrieve his number, he looks up the letters of the word HELP and finds the corresponding digits in the top row of the table. Another example: The word LOVE can be used to help Maciej remember the secret number 2525. Maciej has to remember a new secret number. Only three of the following words produce this new number. Which one does not?

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 |

A | B | C | D | E | F | G | H | I | J |

K | L | M | N | O | P | Q | R | S | T |

U | V | W | X | Y | Z |

## 4752

questions#### Weekly ranking

#### Tags

games 18
double counting 8
generating functions 2
probabilistic method 1
Polynomial 9
inequality 13
area 16
Equation 9
Primitive Roots Modulo Primes 1
Primitive in Arithmetic Progression 6
Base n Representatioons 4
Pell Equation 1
mixed number 1
Fraction 29
Circle 3
Imaginary numbers 1
Decimal number 2
Volume 2
percentages 6
simple equation 19
absolute value 19
rational numbers 20
Operation of Indices 21
Simulataneous Equation A System of Equations 25
Multiplication of Polynomial 17
divisibility 24
Maximum 5
Minimum 8
Fraction 4
Prime Numbers and Composite Numbers 13
Square Number 26
Even and Odd Numbers 13
GDC and LCM 11
GCD and LCM 12
Permutation and combination 9
combinations 5
interger 7
number 10
Diophantine equations 2
equations 1
Grade 6 19
Power 3
equality 2
maxima-minima 2
square root 1
Polygon 2
IGCSE 1
factorial 1
integers 2