# Category Archives: 7puzzleblog.com

## DAY/DYDD 233:

The Main Challenge Firstly, write down three separate lists only containing numbers in the range 1 to 100: List 1 – multiples of 9 List 2 – factors of 108 List 3 – triangular numbers Part 1: Which is the only … Continue reading

## DAY/DYDD 232:

The Main Challenge Try the following Mathelona challenge, taken from our pocket book of challenges. Can you make all three lines work out arithmetically by placing the 12 digits below into the 12 gaps? 0 1 1 … Continue reading

## DAY/DYDD 231:

The Main Challenge Try the following Mathelona-style challenge, similar to those found in our pocket book, details of which can be found by clicking Mathelona. 0 0 1 2 2 2 2 4 … Continue reading

## DAY/DYDD 230:

The Main Challenge Use all three numbers in each of the five groups below, with + – × ÷ available, to try and make the target of 23. But for one of the groups it is impossible. Which one? 1 4 … Continue reading

## DAY/DYDD 229:

The Main Challenge There are five different 24game® challenges below. For each group of four numbers, your task is to arrive at the target answer of 24 by using each of the four digits exactly once, with + – × ÷ available: … Continue reading

## DAY/DYDD 228:

The Main Challenge You have been given a starting number as well as an end answer. There are seven arithmetical steps in all, but the middle step is missing! Start with the number 7, then: –2 ×4 +1 … Continue reading

## DAY/DYDD 227:

The Main Challenge Firstly, allocate each letter of the English alphabet a numerical value as follows: A=1, B=2, C=3 . . . Z=26. When the values of the individual letters are added together, calculate the total value of our popular … Continue reading

## DAY/DYDD 226:

The Main Challenge Your task is to arrive at the target number of 47 by using all five numbers 1, 2, 3, 4 and 5 exactly once each. Can you arrive at 47 in two different ways? Remember, you have … Continue reading

## DAY/DYDD 225:

The Main Challenge Each of the five numbers below is the product of two prime numbers: 15 35 77 143 323 Which is the odd one out, and why? The 7puzzle Challenge The playing board of the … Continue reading

## DAY/DYDD 224:

The Main Challenge Today’s task is to multiply two numbers together, then either add or subtract the third number to achieve the target answer of 37. Using the formula (a×b)±c, where a, b and c are three unique digits from … Continue reading