Study the number pattern carefully.
- What is the missing number in the 11th pattern?
- What is the missing number in the 20th pattern?
- If this number pattern goes on, which pattern number will give you 365?
(a)
Pattern 1: 1
2 + 4 = 5
Pattern 2: 2
2 + 4 = 8
Pattern 3: 3
2 + 4 = 13
Pattern 4: 4
2 + 4 = 20
Formula:
Number for each pattern = Pattern number
2 + 4
Missing number in 11th pattern
= 11
2 + 4
= 125
(b)
Missing number in 20th pattern
= 20
2 + 4
= 404
(c)
Pattern number
2 + 4 = 365
Pattern number
2 = 365 - 4 = 361
Pattern number
= √361
= 19
Answer(s): (a) 125; (b) 404; (c) 19
