DAY 308:

Today’s Challenge

Follow the rules and eliminate every number from a given list, except one.

From the even numbers in the range 2-40 inclusive, eliminate:

  • multiples of 4,
  • single-digit numbers,
  • numbers which are next to (one away from) a prime number or square number.

Which is the only number that remains?

The 7puzzle Challenge

The playing board of the 7puzzle game is a 7-by-7 grid containing 49 different numbers, ranging from 2 up to 84.

The 1st & 3rd rows of the playing board contain the following fourteen numbers:

2    9    13    14    15    22    25    36    40    42    45    66    72    80

What is the product of the two prime numbers?

Make 308 Challenge

Can you arrive at 308 by inserting 2, 4, 6, 8 and 10 into the gaps below?

(◯²×◯÷◯)–(◯×√◯= 308

Answers can be found here.

Click Paul Godding for details of online math tuition. Wherever you are in the world, please get in touch.

This entry was posted in Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *