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# Monthly Archives: February 2018

## DAY 59:

Today’s Challenge Your starting number is 18 and your task is to arrive at the same final answer. There are ten arithmetical steps from beginning to end, each one involving a whole number, but the 9th (and penultimate) step is … Continue reading

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## DAY 58:

Today’s Challenge Starting from 1, find the sum of the first SEVEN whole numbers that do not contain a 3, 5 or 7 as part of their number, or are not multiples of 3, 5 or 7. The 7puzzle Challenge The playing … Continue reading

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## DAY 57:

Today’s Challenge Replace the 12 ◯’s below with 1, 1, 2, 2, 3, 3, 4, 4, 5, 6, 7 and 8 so all three lines work out: ◯ + ◯ = 5 = ◯ – ◯ … Continue reading

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## DAY 56:

Today’s Challenge Replace the 12 ◯’s below with the 12 numbers 0, 1, 2, 2, 3, 3, 4, 6, 6, 7, 9 and 9 so that all three lines work out arithmetically: ◯ + ◯ = 6 … Continue reading

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## DAY 55:

Today’s Challenge ‘Can You Pass A Simple Math Test?’ was recently published in the USA in an attempt to emphasise the importance of adult numeracy skills. It contains five multiple choice questions; just answer A, B, C or D each … Continue reading

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## DAY 54:

Today’s Challenge When 2 is subtracted from a 2-digit number and the result doubled, it becomes the same 2-digit number but with its digits reversed. Only one 2-digit number has this property. What is it? The 7puzzle Challenge The playing board … Continue reading

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## DAY 53:

Today’s Challenge From the numbers below, eliminate all square numbers, triangular numbers, multiples of 4 and factors of 70. 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 Which is … Continue reading

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## DAY 52:

Today’s Challenge List the FIVE 2-digit numbers to have the following attributes: are not odd numbers, are not multiples of 3, 4, or 7, has its digits adding up to more than 10. The 7puzzle Challenge The playing board of the 7puzzle … Continue reading

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## DAY 51:

Today’s Challenge Using each of the numbers 0.1, 0.5, 3 and 6 once each, and with the four arithmetical operations available, can you arrive at the target answer of 7 by two different ways? The 7puzzle Challenge The playing board of the 7puzzle … Continue reading

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## DAY 50:

Today’s Challenge Using the numbers 4, 5 and 6 once each, together with + – × ÷, which THREE target numbers from the following list are NOT mathematically possible to make? 2 3 4 5 6 … Continue reading

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