# Monthly Archives: February 2021

## day/dydd 59 at 7puzzleblog.com

The Main Challenge Your starting number is 18 and your task is to arrive at the same final answer. There are ten arithmetical steps from beginning to end, each one involving a whole number, but the 9th (and penultimate) step … Continue reading

## day/dydd 58 at 7puzzleblog.com

The Main Challenge Starting from 1, find the sum of the first SEVEN whole numbers that do not contain a 3, 5 or 7 as part of their number, nor are multiples of 3, 5 or 7. The 7puzzle Challenge The playing … Continue reading

## day/dydd 57 at 7puzzleblog.com

The Main Challenge Place the 12 numbers 1 1 2 2 3 3 4 4 5 6 7 and 8 into the 12 gaps below so all three lines work out: ◯ + ◯ = 5 = … Continue reading

## day/dydd 56 at 7puzzleblog.com

The Main Challenge Can you place the 12 numbers 0 1 2 2 3 3 4 6 6 7 9 and 9 into the 12 gaps below so that all three lines work out arithmetically? ◯ + ◯ = … Continue reading

## day/dydd 55 at 7puzzleblog.com

The Main Challenge ‘Can You Pass A Simple Math Test?’ was published in the USA in an attempt to emphasise the importance of adult numeracy skills. It contains five multiple choice questions. Simply answer a, b, c or d each time: … Continue reading

## day/dydd 54 at 7puzzleblog.com

The Main Challenge Solve this Octaplus puzzle by finding the values of the eight letters, A to H, from the given clues. Each letter contains a different whole number in the range 1-32: D minus B is an even number, a third of … Continue reading

## day/dydd 53 at 7puzzleblog.com

The Main Challenge From the numbers below, eliminate all: square numbers, triangular numbers, multiples of 4 and factors of 70. 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 Which … Continue reading

## day/dydd 52 at 7puzzleblog.com

The Main Challenge Find the sum of the FIVE 2-digit numbers that are even, has digits adding up to more than 10 and are not multiples of 3, 4 or 7. The 7puzzle Challenge The playing board of the 7puzzle game is a … Continue reading

## day/dydd 51 at 7puzzleblog.com

The Main Challenge Using each of the numbers 0.1, 0.5, 3 and 6 once each, and with the four arithmetical operations available, can you arrive at the target answer of 7 in two different ways? The 7puzzle Challenge The playing board of the 7puzzle … Continue reading

## day/dydd 50 at 7puzzleblog.com

The Main Challenge Using the numbers 4, 5 and 6 once each, together with + – × ÷, which THREE target numbers from the following list are NOT mathematically possible to make? 2 3 4 5 6 … Continue reading