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# Monthly Archives: July 2020

## DAY/DYDD/GIORNO/NAP 203:

The Main Challenge Starting with the number 7, complete the following sixteen arithmetic steps: multiply by ten 40 percent of this double it multiply the digits together increase by 20 percent divide by three increase by 50 percent one-third of this double … Continue reading

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## DAY/DYDD/GIORNO/NAP 202:

The Main Challenge If you added together the first seven odd numbers that do not contain a 3, 5 or 7 as part of their number or are not multiples of 3, 5 or 7, what is your answer? The 7puzzle … Continue reading

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## DAY/DYDD/GIORNO/NAP 201:

The Main Challenge Using the numbers 3, 6 and 10 once in each calculation, together with addition and subtraction, find the only FOUR numbers from 1-30 that are mathematically possible to achieve. The 7puzzle Challenge The playing board of the 7puzzle … Continue reading

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## DAY/DYDD/GIORNO/NAP 200:

The Main Challenge Playing the superb American maths card game, 24game®, can be frustrating but very addictive when testing your arithmetical skills. When using four numbers just once each, with + – × ÷ available, it is only possible to make 24 with only ONE of … Continue reading

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## DAY/DYDD/GIORNO/NAP 199:

The Main Challenge From the numbers in the range 1-50, eliminate the following: multiples of 3 square numbers prime numbers even numbers Which number is the only one that remains? The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

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## DAY/DYDD/GIORNO/NAP 198:

The Main Challenge What is the LOWEST whole number that satisfies all three criteria below? it is the sum of five consecutive whole numbers, it is the sum of two consecutive odd numbers, it is the sum of three consecutive … Continue reading

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## DAY/DYDD/GIORNO/NAP 197:

The Main Challenge There is just one set of three consecutive numbers in ascending order whose sum is less than 50 and follow this sequence: prime number – cube number – square number What is the sum of these three … Continue reading

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## DAY/DYDD/GIORNO/NAP 196:

The Main Challenge Here’s a 10-step number trail involving the four arithmetical operations, some 3-digit numbers, plus fractions and percentages. Start with the number 2, then: add three hundred and eighty –292 +106 –50% 1/2 of this multiply by nine 1/3 … Continue reading

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## DAY/DYDD/GIORNO/NAP 195:

The Main Challenge In this Kakuro-style question, can you list the ONLY way possible to make 16 when adding together five unique digits from 1-9? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different … Continue reading

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## DAY/DYDD/GIORNO/NAP 194:

The Main Challenge This is similar in style to the challenges found at our popular Mathelona number puzzle pocket book. Click the link for more details. ◯ + ◯ = ◯ ◯ + ◯ = … Continue reading

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