Monthly Archives: July 2017

DAY 203:

Today’s 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 202:

Today’s Challenge Add 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 Challenge The playing … Continue reading

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DAY 201:

Today’s Challenge When playing Mathematically Possible, players must analyse which numbers can (or can’t) be made from the three numbers rolled on their dice, but this particular challenge is slightly different as you are only allowed to add and subtract (+ and … Continue reading

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DAY 200:

Today’s 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 one of the … Continue reading

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DAY 199:

Today’s Challenge Follow the rules to eliminate every number from 1-50, except one. Which one will be the last one standing after eliminating the following? multiples of 3 square numbers prime numbers even numbers The 7puzzle Challenge The playing board of the … Continue reading

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DAY 198:

Today’s Challenge What is the LOWEST number that satisfies all three criteria below? it is the sum of five consecutive numbers, it is the sum of two consecutive odd numbers, it is the sum of three consecutive even numbers. The 7puzzle … Continue reading

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DAY 197:

Today’s 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 numbers? … Continue reading

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DAY 196:

Today’s Challenge Here’s a 10-step number trail involving the four arithmetical operations, some 3-digit numbers, fractions and percentages. Without using a calculator, start with the number 2, then: add three hundred and eighty –292 +106 –50% 1/2 of this multiply by … Continue reading

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DAY 195:

Today’s Challenge In this Kakuro-style question, which is 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 numbers, ranging … Continue reading

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DAY 194:

Today’s 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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