Maths Puzzle Examples and Walkthroughs
- 4s Challenge
- ALGEBRAIC Challenge
- ALPHAMETIC
- ARITH-maze
- ARITHMAGON (addition)
- Can-U-Figure-It-Out
- CHINESE Multiplication
- CIRCLE-sums
- DARTS Challenge
- EGYPTIAN Arithmetic
- EQUATE+0,+1,+2 &+3
- EQUATE-sums
- EQUATE-takeaways
- EQUATE-times
- Fractions, Decimals & %'s Challenge
- MIND-Xpanders
- Petite CIRCLE-sums
- POLYGON Challenge
- PRIME NUMBERS Challenge
- RELATIONAL
- ROMAN Arithmetic
- SAFETY Code
- Scientific-Engineering Notations
- SQUARE-sums
- SQUARE-up
- STAR-sums
- SUM-IT
- SUM-IT '4-sided' Pyramid
- X-sums
u-can-do
Chinese Multiplication Puzzles
by G R Burgin
Also known as a lattice method, the Chinese method provides an easy way to multiply any two numbers without the aid of a calculator. The following example illustrates this process using a grid (sized to the numbers being multiplied) and slant lattice lines to form the product or answer. As shown in the example below, the four individual multiplication products (i.e., 7 x 5 = 35, etc.) are preformed and their two digits are divided by the lattice lines. Adding the numbers along and within these diagonal lattice lines, the product in the example of 27 x 59 is determined to equal 1593, as shown. Using this simple illustrated method, the multiplication of any two numbers with any number of digits in each can be carried out. The number of grid boxes is determined by the number of digits in each number being multiplied (in example, matrix is 2 by 2). In the following puzzles, some or part of the multiplied or added values are provided. The object of this puzzle is to find the missing values to determine the original numbers that when multiplied together gives you the correct product as shown on the bottom line. Find these missing values.
To see the solution, point the mouse here.
Contact: mathspuzzles@gordonburgin.com
© G R Burgin 2009