Dozens of compelling and addictive mathematical puzzles twillchallenge
your mental arithmetic and powers of deductive reasoning. Tetonor rules:
each number in the main grid can be formed by adding or multiplying a
pair of numbers in the strip below the grid. Each pair of numbers should
be used twice: once as part of an addition and once as part of a
multiplication. For example, a 10 and 24 in the main grid may be solved
by the sums, 4 + 6 and 4 x 6, respectively. Enter each sum in the boxes
below its answer. Any blanks in the strip must be deduced, bearing in
mind the numbers are listed in ascending order. 60 Easy, 80 Medium and
60 Difficult puzzles included.