Addition and Subtraction Sums

1) Use the Digits 5, 12, 15, and 16 to Complete the Square, Such That the Sum in Each Row and Each Column Is Equal to 34.

Step 1: The sum of the given numbers in the first row is:
2 + 13 + 3 = 18
The total sum of the numbers in the first row = 34.
The sum of the given numbers = 18
Missing numbers = 34 – 18
= 16

Therefore, the missing number in the first row is 16.

Step 2: The sum of the given numbers in the second row is:
11 + 8 + 10 = 29
The total sum of the numbers in the second row = 34.
The sum of the given numbers = 29
Missing numbers = 34 – 29
= 5

Therefore, the missing number in the second row is 5.

Step 3: The sum of the given numbers in the third row is:
7 + 9 + 6 = 22
The total sum of the numbers in the third row = 34.
The sum of the given numbers = 22
Missing numbers = 34 – 22
= 12

Therefore, the missing number in the third row is 12.

Step 4: The sum of the given numbers in the fourth row is:
14 + 4 + 1 = 19
The total sum of the numbers in the fourth row = 34.
The sum of the given numbers = 19
Missing numbers = 34 – 19
= 15

Therefore, the missing number in the fourth row is 15.

Step 5: The complete square is:

 

2) Suresh Was Born in 1890 in the Fifth Month of the Year. The Birth Date of Suresh Is 10 Days More Than the 12th of May. Calculate the Birthday of Suresh and Draw a Magic Square Using Suresh’s Birthday.

Birthday year = 1890
CC = 18
YY = 90
Birthday month = 5th month = May
MM = 05
Birthday date = 10 + 12 = 22.
DD = 22

The numbers in the first row are as follows:
22, 05, 18, 90

The number in the second row are as follows:
90 + 1 = 91, 18 – 1 = 17, 05 – 03 = 02, 22 + 3 = 25

The numbers in the third row are as follows:
05 – 02 = 03, 22 + 2 = 24, 90 + 2 = 92, 18 – 2 = 16

The numbers in the fourth row are as follows:
18 + 1 = 19, 90 – 1 = 89, 22 + 1 = 23, 05 – 1 = 04

The complete square is