Monthly Archives: February 2018

DAY 49:

Today’s Challenge You roll two normal six-sided dice, both containing the numbers 1-6.  If you multiplied the two numbers that show, how many DIFFERENT answers is it possible to obtain? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid … Continue reading

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DAY 48:

Today’s Challenge What is the biggest integer (whole number) less than 630,000 that can be written using all of the six digits from 1 to 6? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging … Continue reading

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DAY 47:

Today’s Challenge If you multiply a certain number by 3 and then add 30, the result is the same as if you first added 17 to this number and then multiplied by 2. Is the value of this number 1, … Continue reading

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DAY 46:

Today’s Challenge The smallest positive integer that has exactly three factors is FOUR; these are 1, 2 and 4. When finding the next integer to have just three factors, what is the product of these three numbers? The 7puzzle Challenge The … Continue reading

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DAY 45:

Today’s Challenge If you multiply two whole numbers together and then add 4, the result is 40. Which one of the following could NOT be the sum of the two whole numbers you initially multiplied? 12      13    … Continue reading

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DAY 44:

Today’s Challenge If the number sequence 2, 5, 8, 11, 14 . . . is continued, which is the only number from the following list that will appear later in the sequence? 22   34   43   57   65 … Continue reading

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DAY 43:

Today’s Challenge Using the numbers 2, 4 and 6 once each, together with + – × ÷, find the SIX target numbers from the following list that are mathematically possible to make: 12    14    16    18    20    … Continue reading

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DAY 42:

Today’s Challenge You’ve rolled the numbers 2, 4 and 6 with your three dice.  Using these once each, with + – × ÷ available, find the three target numbers from 1-10 that it is NOT possible to make. Visit Roll3Dice.com for further details of similar challenges. The … Continue reading

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DAY 41:

Today’s Challenge When a certain 4-digit number is multiplied by 4, its digits appear in reverse order. It also has both of the following properties:  its first digit is a quarter of the last one, and  its second digit is … Continue reading

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DAY 40:

Today’s Challenge In all four groups below, it is possible to make 24 by using the four numbers once each, with + – × ÷ available. Can you show how to achieve the target number of 24 in each case?    3    … Continue reading

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