Page 24 - NUMINO Challenge_B1

Problem solving

1 In the following addition problem, each letter Key Points
represents a different digit. Find the 4-digit
number, abcd. ‘a’ can either be 1
or 2.

abcd abcd abcd abcd dcba

2 In the following multiplication problem, A, B, and Since the product
C represent three different digits. Find the digits has three of the
they represent. same digits, try
replacing C with
AB 111, 222, 333, to
A find out which digit
makes the equation
CCC true.

21Number Puzzles