Number Grids
Square or Rectangular Number Grids
- Number grids have certain number of rows (horizontal
divisions) and columns (vertical divisions) in which numbers are arranged.
- There is some relationship among the numbers either along the rows or along the columns.
- The most important task is to check if the relationship exists along the rows or along the columns.
- Missing number can be calculated using same pattern between the numbers in the respective row or column.
Lets solve some number grids

First row (4 ÷ 2) + (16 x 2) =34
Second row (18 ÷ 2) + (6 x 2) = 21
Third row : (20 ÷ 2) + (C X 2) = 52
: (C X 2) = 52 – 10
Missing Number: C = 42÷2=21
Missing Number: C = 21

First column: (4 x 7) + 4 = 32
Third column: (13 x 7) + 13 = 104
Missing Number: C = (26 X 3) + 26 =104
Missing Number: = 104

First column: 15 + 16 + 81 – 2 = 110
Third column: 13 + 16 + 113 – 2 = 140
Second column: 56 + b + 87 – 2 = 150
Missing Number: b = 150 – (87 + 56 + -2)
Missing Number: = 9

First Row: (15 X 15) – (13 X 13) = 56
Third Row: (16 X 16) – (13 X 13) = 87
Second Row: b = (16 x 16) – (14 X 14)
Missing Number: b = 60
Numbers can be arranged in many geometrical patterns but the concept remains the same.