Monthly Archives: August 2017

DAY 244:

Today’s Challenge Consider all odd numbers from 1 through to 23. Eliminate all single-digit numbers and multiples of 7 as well as numbers that have their two digits adding up to an even number. Which number is the last one … Continue reading

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DAY 243:

Today’s Challenge We invite you to use seven 3’s (3, 3, 3, 3, 3, 3 and 3) once each, with + – × ÷ available, to make various target numbers. For instance, to make 1 and 2, you could do: [3 × (3÷3)] – (3÷3) – (3÷3)  = … Continue reading

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DAY 242:

Today’s Challenge If the number sequence 4, 10, 16, 22, 28 . . . is continued, which is the only number from the following list that will NOT appear later in the sequence? 64     70     74   … Continue reading

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DAY 241:

Today’s Challenge You’ve rolled the numbers 3, 5 and 6 with three dice.  Using these once each, with + – × ÷ available, which three target numbers from 1-10 are NOT possible to make? Visit Roll3Dice.com and the hashtags #Roll3Dice and #R3D for details. The … Continue reading

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DAY 240:

Today’s Challenge Following on from DAY 187, here’s another one of the unique Keith Number challenges. This was made famous by Mike Keith and if you like playing around with numbers, you’ll love having a go at this fun concept. The … Continue reading

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DAY 239:

Today’s Challenge Three UNIQUE digits from 1-9 must be used to arrive at a specified target number, today it is 19. The formula is simple – multiply two numbers together, then either add or subtract the third number to achieve … Continue reading

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DAY 238:

Today’s Challenge Here’s a 12-step number trail involving + – × ÷ and the numbers 4 and 5. Start with the number 5, then: +5 ÷5 multiply by 4 subtract 4 ×5 add 5 divide by 5 add 4 –5 ÷4 +4 … Continue reading

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DAY 237:

Today’s Challenge There are two sets of three consecutive numbers, in ascending order, whose sum is less than 50 and follow this sequence:   triangular number – square number – prime number Can you list both sets of numbers? The … Continue reading

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DAY 236:

Today’s Challenge Study the seven clues below and place the numbers 1-9 into the nine positions of the grid. Each number should appear exactly once. x              x              x … Continue reading

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DAY 235:

Today’s Challenge You’ve rolled the numbers 4, 5 and 5 with three dice.  Using these once each, with + – × ÷ available, find the only FOUR target numbers from 1-10 that it is possible to make. Visit Roll3Dice.com and the hashtags #Roll3Dice #R3D for further details of … Continue reading

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