# Author Archives: 7puzzle

## DAY 339:

The Main Challenge Clues are given to help you find a particular number from the following facts: I am represented by just one word when written in English, On one side of me is a multiple of 3, on the other … Continue reading

## DAY 338:

The Main Challenge Here’s a number trail involving 12 arithmetical steps. Start with the number 21, then: 1/3 of this multiply by seven +23 ÷3 +75% +5 –7 Find 10% of this Square this +2 Double this Square root of … Continue reading

## DAY 337:

The Main Challenge Which of these 3-digit numbers is NOT a multiple of 3? 123 234 345 456 567 678 789 890 The 7puzzle Challenge The playing … Continue reading

## DAY 336:

The Main Challenge Try the following Mathelona challenge by placing the digits 0 1 1 2 3 3 4 4 5 6 7 and 7 into the 12 gaps below and making all three lines work out arithmetically. ◯ + ◯ = … Continue reading

## DAY 335:

The Main Challenge . . . is a tricky number puzzle from Mathematically Possible, our board game that is great for arithmetic and strategy: Using the numbers 4, 5 and 10 once each, with + – × ÷ available, can you list … Continue reading

## DAY 334:

The Main Challenge . . . involves making 7 when using the four numbers 0.7, 1.6, 2 and 10 once each, and with the four arithmetical operations + – × ÷ available. Can you arrive at our signature target answer of 7? The 7puzzle … Continue reading

## DAY 333:

The Main Challenge Each of these three numbers is the product of three consecutive whole numbers: 120 210 336 What is the next number in this sequence? The 7puzzle Challenge The playing board of the … Continue reading

## DAY 332:

The Main Challenge If you eliminated multiples of 3, 5 and 7 from this list: 12 14 18 21 25 28 30 33 35 36 40 42 44 48 54 55 56 60 which is the ONLY number that would … Continue reading

## DAY 331:

The Main Challenge Here is an interesting logic puzzle for you to try. Insert the numbers 1-9 into the correct positions in this 3-by-3 grid after studying the seven clues below. Each number should appear exactly once. x … Continue reading

## DAY 330:

The Main Challenge This is a number trail involving ten arithmetical steps. Be careful with your calculations – and no calculators please! Start with the number 40, then: multiply by 4 +10% subtract 15 divide by seven add nine 1/2 of this … Continue reading