Monthly Archives: March 2019

DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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DAY/DYDD 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

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