# Monthly Archives: November 2019

## DAY/DYDD 314:

The Main Challenge Today’s task using the excellent, addictive American maths card game 24game is to try and arrive at the target answer of 24 from each of the following seven groups of numbers. In each calculation, all four digits must be … Continue reading

## DAY/DYDD 313:

The Main Challenge Consider the four groups of numbers 3 3 3, 4 4 4, 5 5 5 and 6 6 6. There are only six target numbers it is possible to make in the range 10-30 when + – … Continue reading

## DAY/DYDD 312:

The Main Challenge By using the formula (a×b)+c, where a b and c are three unique digits from 1-9, one way of arriving at 24 is (5×3)+9, but can you find the only other way of making 24 when using the above … Continue reading

## DAY/DYDD 311:

The Main Challenge Further details of my popular Mathelona number puzzle can be found by clicking this Mathelona link. Can you make all four lines work out arithmetically by filling the 16 gaps below with digits 0-9? Each digit can only be inserted … Continue reading

## DAY/DYDD 310:

The Main Challenge Test your knowledge of number combinations by listing the SIX different ways of making 20 when adding together five unique digits from 1 to 9 in this Kakuro-style question. The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

## DAY/DYDD 309:

The Main Challenge This Kakuro-style question invites you to find various number combinations. List the SEVEN different ways of making 12 when adding together three unique digits from 1 to 9. The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

## DAY/DYDD 308:

The Main Challenge From the EVEN numbers in the range 2-40 inclusive, eliminate: multiples of 4, single-digit numbers, numbers which are next to (one away from) a prime number or square number. Which is the only number that remains? The 7puzzle … Continue reading

## DAY/DYDD 307:

The Main Challenge Using the numbers 3, 5 and 7 once each, with + – × ÷ available, list the FIVE even-numbered target numbers from 30-60 inclusive that are mathematically possible to make. The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 … Continue reading