# Monthly Archives: March 2021

## DAY/DYDD/PÄIVÄ/NAP 90

The Main Challenge When playing the brilliant 24game, your task is to arrive at the target answer of 24. Each of the four numbers 0.5, 1, 5 and 10 must be used exactly once each in your calculation. The four … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 89

The Main Challenge Of the numbers 1, 2, 3 . . . 6000, how many are NOT multiples of 2, 3 or 5? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 88

The Main Challenge In our latest Mathelona challenge, can you place the 12 listed numbers into the 12 gaps so all three lines work out arithmetically? 0 1 1 2 2 3 4 5 … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 87

The Main Challenge Which is the ONLY way to make 38 when adding together SIX unique digits from 1-9? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 86

The Main Challenge How can you use six 7’s (7 7 7 7 7 and 7) once each, together with the four arithmetical operations + – × ÷, to arrive at the target answer of 100? The 7puzzle Challenge The playing board … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 85

The Main Challenge Find the sum of the following three numbers: twelve thousand and two thirty five thousand and thirty-five fifty five thousand, one hundred and fifty-five Write your answer in words. The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 84

The Main Challenge Follow these six steps: Work out the sum of 3 and 5, Calculate the difference between 3 and 5, Find the product of the two answers in Points 1 and 2, Find the square root to your answer … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 83

The Main Challenge What is the sum of the multiples of 0.5 in the range 10 to 20 inclusive? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up to 84. The 2nd & 3rd rows contain … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 82

The Main Challenge Using each of the four numbers 0.8, 0.9, 1.5 and 5 once each, and with the four arithmetical operations + – × ÷ available to use, can you arrive at the target answer of 7? The 7puzzle Challenge The playing board of the … Continue reading

## DAY/DYDD/PÄIVÄ/NAP 81

The Main Challenge Carry out the following 15-step number trail – with no calculator! Start with 20, then: +1 ÷3 ×5 –7 +2 ÷6 +4 –1 ×3 ÷4 +4 –5 ×1 +3 ×6 = ? What is your final answer? The 7puzzle Challenge The playing board … Continue reading