Consider the pattern.
- What is the sum of Row 5?
- What is the sum of Row 43?
- If the sum is 225, what is the row number?
(a)
Pattern for the sum of each row
Row 1: 1
2 = 1
Row 2: 2
2 = 4
Row 3: 3
2 = 9
Formula:
Sum of each row = (Row number)
2 Sum of Row 5
= 5
2 = 5 x 5
= 25
(b)
Sum of Row 43
= 43
2 = 43 x 43
= 1849
(c)
Row number = √(Sum of each row)
Row number with the sum 225
= √225
= 15
Answer(s): (a) 25; (b) 1849; (c) 15
