Study the number pattern carefully.
- What is the missing number in the 10th pattern?
- What is the missing number in the 21st pattern?
- If this number pattern goes on, which pattern number will give you 904?
(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 10th pattern
= 10
2 + 4
= 104
(b)
Missing number in 21st pattern
= 21
2 + 4
= 445
(c)
Pattern number
2 + 4 = 904
Pattern number
2 = 904 - 4 = 900
Pattern number
= √900
= 30
Answer(s): (a) 104; (b) 445; (c) 30
