7puzzleblog.com

At the 7puzzle company, we produce regular number puzzles for our many followers from over 130 different countries and territories. Our aim is to help improve the basic knowledge and confidence of number & arithmetic in a fun way for people all over the world.

Please enjoy your visit and spread the message about the fabulous number puzzles at 7puzzleblog.com.

Try some of our recent challenges, including the latest #117 and #118, which will test your arithmetical and logical skills. There are over 1,000 other number challenges to try at this website if you delve deeply enough!

You can also follow me and my tweets at @7puzzle.

Paul Godding: Owner, the 7puzzle company

Your task is to arrive at the target answer of 24 by using each of the numbers 2, 3, 6 and 7 once each, and having + – x ÷ available.  Can you do it?

Can you replace the 12 ?’s below with the 12 numbers 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 8 and 10 so that all four lines work out arithmetically?

?   +   ?    =     ?
?   +   ?    =     ?
?   +   ?    =     ?
?   +   ?    =     ?

If you enjoy this type of number puzzle, click on this Mathelona link for details of my challenging app.

Only one of the following 3-digit numbers is divisible by 9. Which is it?

236    297    304    332    499    529    587    660    745    771    888    933

N.B. Do you know the trick on how to find this out quickly?

Try the following in your head to test/improve your mental arithmetic. For the number gymnasts, you have 30 seconds to get the correct answer to this 20-step question.

Start with the number 6, then:

+2   ÷4   +1   x4   -1   x5   -16   x2   -19   +1   ÷10   +7   x4   -16   ÷3   -1   x5   -8   x2   +7

What is your final answer?

Can you replace the 12 ?’s 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?

?   +   ?    =     ?
?   +   ?    =     ?
?   +   ?    =     ?
?   +   ?    =     ?

If you enjoy this type of number puzzle, click on this Mathelona link for details of my challenging app.

Here is a unique 7-part question.  Firstly, answer all seven parts:

1. (4 + 3) + (2 - 1) = ?
2. (4 × 3) ÷ (1 × 1) = ?
3. (4 – 3) × (2 ÷ 1) = ?
4. (3 + 3) ÷ (2 × 1) = ?
5. (3 ÷ 3) – (1 + 1) = ?
6. (3 – 3) × (1 ÷ 1) = ?
7. (3 × 3) – (2 + 1) = ?

then find the sum of all seven answers.  What is your overall answer?

If you multiply a number by 5 and then subtract 1, the result is the same as if you first added 3 to this number and then multiplied by 3. Is the value of this number 1, 2, 3, 4 or 5?

The playing board of the 7puzzle game contains 49 different numbers, the lowest being 2 and the highest 84. There are seven rows, each row consisting of seven numbers.

The bottom two rows consist of the following numbers:

4    5    11    12    18    20    24    27    30    33    49    56    70    77

What is the difference between the total of the even numbers and the total of the odd numbers?

Click the7puzzlegame.com for further details on our fabulous game.

A 6-step question with just one answer at the end. Can you work it out?

1. Work out the sum of 4 and 6,
2. Calculate the product of 4 and 6,
3. Find the difference between the two answers in points 1 and 2,
4. Square your answer in point 3,
5. Subtract 75 from your answer in point 4,
6. Find the Square Root of your answer in point 5.

What is your final answer?