# Monthly Archives: May 2017

## DAY 152:

Today’s Challenge Using the three numbers 1, 2 and 4 just once each, with + – × ÷ available to you, what is the lowest positive number it is NOT mathematically possible to make? The 7puzzle Challenge The playing board of the 7puzzle game is … Continue reading

## DAY 151:

Today’s Challenge Solve all four lines arithmetically by replacing the 16 ◯ ‘s below with digits 0-9, but each digit must only be inserted a maximum of TWICE in the whole challenge: ◯  +  ◯   =     8     … Continue reading

## DAY 150:

Today’s Challenge Find the sum of the numbers that remain after eliminating all multiples of 3, 5 and 7 from all odd numbers between 10 and 40. Also, do you notice anything in particular about these remaining numbers? The 7puzzle Challenge The … Continue reading

## DAY 149:

Today’s Challenge If you added 3+6, then to that answer added 9, then 12 . . . and kept on adding consecutive multiples of 3 to the previous total, what is the first answer you would reach that is more … Continue reading

## DAY 148:

Today’s Challenge Which is the lowest whole number that is not a multiple of 5, 6, 7, 11 or 13 nor a prime number, square number or cube number? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 … Continue reading