Page 38 - NUMINO Challenge_B1

Basic Concepts Operations Puzzles

Operations puzzle is a math puzzle in which you fill in the squares with digits,
such that the sum of the digits is equal to the numbers in the triangle. The
rules are shown below.

Rules 6183
1. The number in each colored triangle represents the
11 5 1 3 2 10
sum of the digits in the squares to the right or below. 14
2. Only digits from 1 to 9 can be used in the squares.
3. The same digit cannot be used in a single sum. 32 1 8 4 1 3
3

1 1 3 2 1 1 1
20 8

93 5 1 3 1 2
3

Example) 9 3 5 1 93 3 3 17 8 9 8 1 3 4
1

13 6 1 2 4

Example Solve the following operations puzzle according to the rules above.

36
4

47
10

6

Class Notes

First, find the digits that make the smallest sums in the triangle according to the rules.
Then fill in the blanks.

Since 3 1 2, A can either be 1 or . 36

If A 2, B , which does not meet the rules. 4A B4 7
10 DFH
Therefore, A , B , and C .
C

Using the digits in A, B, and C, we can conclude that 6E G I

D and E .

Using the digits in A, B, C, D, and E, we can conclude that F ,G ,H ,

and I .

35Puzzles and Games