Author Archives: 7puzzle

DAY 114:

Today’s Challenge Can you replace the 12 gaps below with the 12 numbers 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12 and 13 so that all four lines work out arithmetically? ◯   +   ◯   … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 113:

Today’s Challenge Here is a unique 7-part question.  Firstly, answer all seven parts: (4 + 3) + (2 – 1) = ? (4 × 3) ÷ (1 × 1) = ? (4 – 3) × (2 ÷ 1) = ? (3 + 3) ÷ (2 × 1) = … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 112:

Today’s Challenge If you multiply a mystery number by 6 and then subtract 6, the result is the same as if you first multiplied the same mystery number by 3 and then added 3. Is the value of this mystery number 1, 2, … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 111:

Today’s Challenge . . . is an exciting Japanese puzzle where you have to insert 1, 4, 5 and 5 into the four gaps on each line. Can you solve it so both answers come to 10?  (◯+◯–◯)×◯ = 10 … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 110:

Today’s Challenge A 7-step question – can you work out the correct answer at the end of the 7th step?  Work out the sum of 4 and 6,  Calculate the product of 4 and 6,  Find the difference between the … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 109:

Today’s Challenge A last chance to get all seven correct, but be careful as there are one or two tricky ones! (1 – 2) – (3 – 4) = ? 54 – 31 = ? What is 25 less than the product of 20 … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 108:

Today’s Challenge Here’s seven more mental arithmetic questions to try.  Can you get all seven correct? (11 – 5) – (4 + 1) = ? What is 10 more than –4? 47 × 4 = ? 0.32 ÷ 4 = ? 5 7/8 – 3 … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 107:

Today’s Challenge Here’s seven tricky mental teasers to try: (18 – 5) – (7 – 17) = ? 128 + 294 = ? How many seconds are in a quarter-of-an-hour? How many degrees are in three-quarters of a circle? (16 – 8) × (13 – 8) … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 106:

Today’s Challenge Here are seven mental arithmetic questions for you to try: Which number multiplied by itself gives 196? What is 50 + 400 + 5? 12 + 34 = ? If Jo can run 10 miles in one hour, … Continue reading

Posted in 7puzzleblog.com | Leave a comment

DAY 105:

Today’s Challenge How quickly can you correctly answer the following seven questions?  (17 – 4) + (12 – 9) = ?  (3 – 2) – (16 – 16) = ?  What is Seven and seven-eighths minus Four-and-a-half?  109 + 10 = ?  (3 + 16) … Continue reading

Posted in 7puzzleblog.com | Leave a comment