# Monthly Archives: September 2017

## DAY 264:

Today’s Challenge Your task is to make the four lines below work out arithmetically. Simply replace the ◯’s with digits from 0 to 9, but each digit can only be inserted a maximum of twice. ◯  +  ◯   = … Continue reading

## DAY 263:

Today’s Challenge One of our popular MATHELONA challenges awaits you, can you complete this by making all four lines work out arithmetically?  Replace the 16 ◯’s with digits 0 to 9, but each digit can only be inserted a maximum of twice. … Continue reading

## DAY 262:

Today’s Challenge Read the following facts to work out my numerical value: I am a 3-digit number less than 200 I am a multiple of 11 add 4 to me and I become a multiple of 5 all my digits … Continue reading

## DAY 261:

Today’s Challenge Your task is to make all four lines below work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9, but each digit can only be used a maximum of twice! Can you complete this MATHELONA challenge? … Continue reading

## DAY 260:

Today’s Challenge All of the following 3-digit numbers are divisible by 3, except one.  Which one? 102   111   117   126   132   139   144   153   162   168   174   180 The 7puzzle … Continue reading

## DAY 259:

Today’s Challenge Kakuro is a fabulous puzzle which can drastically improve everyone’s number combination skills. The rules are very simple: Just like a crossword, fill in the boxes, Each box must contain a number from 1-9 and each run of boxes … Continue reading

## DAY 258:

Today’s Challenge Our arithmetic and strategy board game, Mathematically Possible, uses three normal dice involving numbers from 1 to 6, but larger numbers can be introduced to the game simply by using special dice, just as in this challenge. Use the … Continue reading

## DAY 257:

Today’s Challenge When using the numbers 2, 5 and 7 once each, with + – × ÷ available, can you list the 12 target numbers from 1-30 that are mathematically possible to achieve? Full details of our popular arithmetic and strategy board game can … Continue reading

## DAY 256:

Today’s Challenge Start at 7 and subtract 0.1, then 0.2, then 0.3 . . . and so on.  What is the first answer less than 1 you will arrive at, followed by the first negative number? The 7puzzle Challenge The playing board of the … Continue reading

## DAY 255:

Today’s Challenge Here’s a 2-part, 7-step number trail involving all four arithmetical operations. Part 1: When starting with the number 15, what is your final answer? –1 +2 ×3 ÷4 +5 –6 ×7 Part 2: What must your starting number … Continue reading