Download presentation

Presentation is loading. Please wait.

1
**Strategy to solve complex problems**

Use a number 1, 2, 3, 4, 5, 6, 7, 8, 9 only once so that sum of three numbers are identical in each row, column and diagonal:

2
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers.

3
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers.

4
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers.

5
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers.

6
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers. = 45

7
Step 1: Determine what is known: • Sum of must be the sum of a three identical numbers. = 45

8
Step 2: Sum of three numbers = 15: = 45 • 7, 8, 9 are separated. Otherwise 7+8 = 15, 7+9 = 16, and 8+9 = 17.

9
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 2: Sum of three numbers = 15: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1

10
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 7 & 9 add up to 15 in two separate ways. • 8 adds up to 15 in three separate ways.

11
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 8 has a corner. 8 • 7 & 9 are in the middle. 9 7

12
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 5 is in the center, as it adds 3 ways 8 5 9 7

13
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 5 is in the center, as it adds 3 ways 8 5 9 7

14
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 1, 2 and 3 are filled next 8 3 1 5 9 7 2

15
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 6 is next 8 3 1 5 9 6 7 2

16
**7 + __ + __ = 8 + __ + __ = 9 + __ + __**

Step 3: 7 + __ + __ = 8 + __ + __ = 9 + __ + __ 8 7 6 6+2 5+3 6+1 5+2 4+3 4+2 5+1 • 4 is the last. 8 3 4 1 5 9 6 7 2

Similar presentations

Presentation is loading. Please wait....

OK

Adding a Sequence of numbers (Pairing Method)

Adding a Sequence of numbers (Pairing Method)

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on condition based maintenance management Ppt on project management process Ppt on depth first search algorithm Ppt on latest technology in mechanical engineering Ppt on elections in india download music Ppt online form date Ppt on virtual file system Ppt on area of parallelogram and triangles and angles Download ppt on oxidation and reduction reactions Free download ppt on effective communication skills