Author Archives: 7puzzle

The Main Challenge When allocating each letter of the English alphabet a numerical value as follows, A=1 B=2 C=3 . . . Z=26, calculate your answer when adding up the values of the individual letters of: MATHEMATICALLY POSSIBLE Take a … Continue reading →

The Main Challenge Using 1, 3 and 5 once each and with + – × ÷ available, which 13 target numbers from 1-30 are mathematically possible to make? 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 →

The Main Challenge In our FlagMath series of maths card games, players try to find eleven different pairs of answers quicker than their opponents. In our blog question below, you only have to find one pair. The two sections both contain nine letters, … Continue reading →

The Main Challenge Another Mathelona challenge with a difference; no addition calculations at all. Your task is to make all four lines work out arithmetically by filling the 16 gaps with digits from 0 to 9.  Each digit can only be inserted a … Continue reading →

The Main Challenge . . . is Mathelona with a difference, not an addition in sight! But can you still make all four lines work out arithmetically by filling the 16 gaps with digits from 0 to 9?  Remember, each digit can only … Continue reading →

The Main Challenge Here’s another Mathelona challenge based on my popular number puzzles. Can you make all four lines work out arithmetically by filling the 16 gaps with digits from 0 to 9?  But, each digit can only be inserted a maximum … Continue reading →

The Main Challenge If you wrote down all single-digit numbers and factors of 80, how many different numbers would be 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 to 84. … Continue reading →

The Main Challenge . . . is to arrive at the target number of 18 by adding together exactly five numbers.  You are limited to using the digits 1 to 5 but these can be used any number of times in … Continue reading →

The Main 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 … Continue reading →

The Main Challenge Can you arrive at the target answer of 7 in both lines by using each of the numbers 0.4, 0.5, 1 and 2 exactly once in each line?  ◯÷◯+◯÷◯ = 7  ◯÷(◯×◯)+◯ = 7 The 7puzzle Challenge The playing … Continue reading →