Pyramid Numbers is a challenge of both your mental arithmetic and memory.

A complete Pyramid Numbers puzzle has a number of layers, each of which consists of a set of numbers, each number separated from its neighbours by one of the following arithmetic operators: +, -, x or /. Each layer above the bottom layer has one fewer number compared to the layer below, until the peak of the pyramid is reached where the layer consists of just a single number. The key feature of the numbers in all but the bottom layer is that each number is the result of the operation specified directly beneath it. So, if a layer has the sequence 32 x 2 + 6, the two numbers in the layer above will be 64 (i.e. 32 x 2) and 8 (i.e. 2 + 6).

When the puzzle opens, or whenever you press the New button, you will be presented with a pyramid in which the number in one of the corners (top, bottom-right or bottom-left) is hidden, as are all the numbers in the layers between the top and bottom layers.

Your objective is to use your mental arithmetic skills and memory to determine in your mind what the number in the hidden corner is. To do this, you will, of course, have to determine the values in the intermediate layers as you go along.

Once you're satisfied that you know what the missing corner number is, just press the Show button, which reveals the completed pyramid.

Note: The numbers used may be positive or negative, but they are always whole numbers, so if you find that the result of a division at any point is not a whole number, you can be sure that you have made a mistake.

This puzzle can be played as a game if two or more people can see the screen. The winner is the first player to give the correct answer.

Levels and times

There are three levels (1-3). The default level is 1.

  • At level 1, the pyramid has 4 layers, and 4 numbers in the base layer, and the numbers to deal with range from -99 to +99.
  • At level 2, the pyramid has 5 layers, and 5 numbers in the base layer, and the numbers to deal with range from -199 to +199.
  • At level 3, the pyramid has 5 layers, and 5 numbers in the base layer, and the numbers to deal with range from -999 to +999.
The current level is shown near the bottom-right corner, with '+' and '-' buttons at the sides, which allow you to change the level.

After the problem is presented, a timer starts (bottom left), which initially has a green background. For each level, there is a default time suggested, after which the background of the timer changes to red. The time continues to count up, a second at a time, until the result of the final line is displayed, even when you have exceeded the suggested time. The suggested times are 30s for level 1, 60s for level 2 and 90s for level 3.

Press the New button at any time for a new puzzle, using the current level setting.

Terms of use

This software may be used for personal purposes only.  It may not be used for commercial purposes.

The software, code and script of this application may not be copied or be distributed to others.

The software, code and script may not be altered in any way.

Copyright of the software, code and script, and its help documentation, is held by TopAccolades Limited.  No part of the software, code, script or documentation may be copied or used in another application or document.

Although every effort has been made to ensure that this software functions as intended, TopAccolades Limited provides no warranty of merchantability, or fitness for a particular purpose, in relation to this application or its support.

TopAccolades Limited shall not be liable for any damages whatsoever arising out of the use of or inability to use this application or the provision of or failure to provide support.

Copyright TopAccolades Limited
www.topaccolades.com

Version: 3.0 (20170327)
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