DAY 357:

Today’s Challenge

. . . is an 11-step number trail involving all four arithmetical operations.

Start with the number 8, then:

  • multiply by 5
  • 25% of this
  • 5
  • add twenty-two
  • 1/3 of this
  • ×4
  • subtract twenty-four
  • +9
  • divide by 7
  • add three
  • ÷3

What is your final answer?

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 2nd & 5th columns of the playing board contain the following fourteen numbers:

2    8    10    11    14    16    18    25    33    44    45    48    70    84

By adding three different numbers from the list, what is the lowest prime number you can make?

Make 357 Challenge

Can you arrive at 357 by inserting 4, 5, 7, 8 and 9 into the gaps below?

(◯++◯)×◯×√◯ = 357

Answers can be found here.

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

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