Monthly Archives: May 2019

DAY/DYDD 143:

The Main Challenge Start with the number 50, then: +27  –42   divide by 5  ×4   +50%   two-thirds of this   ÷7   =    ? What is your final answer to this 7-step number trail? The 7puzzle Challenge The playing board of the … Continue reading

WELCOME/CROESO

A warm Welsh welcome to 7puzzleblog.com and our compendium of daily number puzzles. Five challenges are posted each day, seven days a week, and designed for our many followers from nearly 170 countries & territories throughout the world. As well as our ever-expanding website … Continue reading

DAY/DYDD 142:

The Main Challenge From the numbers 1-20, eliminate all: square numbers prime numbers triangular numbers multiples of 6 Add together the numbers that remain; what is your total? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 … Continue reading

DAY/DYDD 141:

The Main Challenge One of our easier Mathelona-style challenges, still utilising the four arithmetic operations.  Place the eight digits 1 2 2 3 4 4 5 and 6 into the gaps so both lines work out: ◯  +  ◯   =   … Continue reading

DAY/DYDD 140:

The Main Challenge Group the following numbers into three groups of three so that the sum of each of the triples are the same. What is this sum? 11    25    35    43    51    63    … Continue reading

DAY/DYDD 139:

The Main Challenge There are two sections below, both containing ten letters, A-J.  Each letter is linked to a division calculation: Section 1 D:9÷3  H:8÷2  B:12÷3  I:8÷4  A:4÷2  E:24÷6  G:15÷5  C:20÷4  F:25÷5  J:7÷7 Section 2 I:6÷2  G:6÷3  D:10÷2  E:12÷4  J:14÷7  B:20÷5  A:18÷6  … Continue reading

DAY/DYDD 138:

The Main Challenge The two sections below both contain ten letters, A-J; each of which has a multiplication calculation assigned to it: Section 1 C:10×2  J:4×3  F:8×5  D:3×3  I:3×2  G:7×4  B:5×4  H:9×4  E:10×3  A:6×4 Section 2 B:12×2  D:6×1  G:8×3  J:5×2 … Continue reading

DAY/DYDD 137:

The Main Challenge It is possible to use seven 5’s (5 5 5 5 5 5 and 5) once each, with the four operations + – × ÷, to make all the target numbers from 1 to 5. For instance, to … Continue reading