# Monthly Archives: August 2017

## DAY 234:

Today’s Challenge Using each of the numbers 1.5, 2, 2.5 and 3 once each, and with the four arithmetical operations + – × and ÷ available, can you arrive at the target answer of 7 in three different ways? The 7puzzle Challenge The playing … Continue reading

## DAY 233:

Today’s 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 number … Continue reading

## DAY 232:

Today’s Challenge Try the following MATHELONA challenge, taken from our pocket book of challenges. Can you make all three lines work out arithmetically by replacing the 12 ◯’s below with the following 12 digits? 0     1     1     … Continue reading

## DAY 231:

Today’s Challenge Try the following MATHELONA-style challenge, similar to those found in our pocket book, details of which can be found by clicking MATHELONA. Your task is to make all four lines work out arithmetically by replacing the 16 ◯’s below with … Continue reading

## DAY 230:

Today’s 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 can’t be done. Which one?   1    4 … Continue reading

## DAY 229:

Today’s 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 228:

Today’s 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     … Continue reading

## DAY 227:

Today’s 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 maths card … Continue reading