Category Archives: 7puzzleblog.com

DAY 284:

Today’s Challenge Another MATHELONA challenge with a difference – no addition calculations at all. Your task is to make all four lines work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9.  Each digit can only be inserted a … Continue reading

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DAY 283:

Today’s Challenge . . . is MATHELONA with a difference, not an addition in sight! But can you still make all four lines work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9?  Remember, each digit can only be … Continue reading

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DAY 282:

Today’s Challenge Here’s another MATHELONA challenge based on my popular number puzzles. Can you make all four lines work out arithmetically by replacing the 16 ◯’s with digits from 0 to 9?  Remember, each digit can only be inserted a maximum of … Continue reading

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DAY 281:

Today’s Challenge If you wrote down all single-digit numbers and the factors of 80, how many different numbers would be written on your list? The 7puzzle Challenge The playing board of the 7puzzle game is a 7-by-7 grid of 49 different numbers, ranging from 2 up … Continue reading

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DAY 280:

Today’s Challenge . . . is to arrive at the target number of 18 by adding together exactly FIVE numbers.  You are limited to using digits 1 to 5 but these can be used any number of times in each calculation. One way … Continue reading

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DAY 279:

Today’s Challenge Try this number trail involving 14 arithmetical steps.  Start with 16, then: ÷4 one-half of this ×7 –7 ×8 add seventeen +7 1/10 of this –2 ×13 one-third of this ÷2 +43 1/7 of this What is your final answer? The 7puzzle Challenge … Continue reading

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DAY 278:

Today’s Challenge Can you arrive at the target answer of 7 on both lines by using each of the numbers 0.4, 0.5, 1 and 2 exactly once each, and with + – × ÷ available?  (◯÷◯)+(◯÷◯) = 7  [◯÷(◯×◯)]+◯ = 7 The 7puzzle Challenge … Continue reading

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DAY 277:

Today’s Challenge Each of the ten letters, A-J, in the two sections below contains a subtraction calculation: Section 1 E:7–4   J:2–1   G:7–5   A:8–6   C:4–2   I:8–5   F:6–5   B:9–8   H:9–5   D:5–4 Section 2 I:4–3 … Continue reading

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DAY 276:

Today’s Challenge Using the numbers 2, 3 and 6 once each, with + – × ÷ available, list the 14 target numbers from 1-30 it is mathematically possible to achieve. Click the link to find out more about our amazing best-selling board game. The 7puzzle Challenge The … Continue reading

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DAY 275:

Today’s Challenge Your task is to arrive at the target answer of 7 in all four lines by inserting the numbers 0.5, 0.5, 2 and 3 once each. [Note:  Lines 2 & 3 contain two different methods of arriving at 7]  (◯×◯)+◯+◯ … Continue reading

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