94
find the missing number 8-4-9 14-5-2 18-1-blank?
57
2
16. 1 is added to the difference each time: 1 + 1 = 2 2 + 2 = 4 4 + 3 = 7 7 + 4 = 11 11 + 5 = 16 [the missing number] 16 + 6 = 22
32 32 4 +4 = 8 8 + 6 = 14 14 + 8 = 22 22 + 10 = 32 The sequence starts at 4 and then adds 4, to get 8, then adds 6 to get 14, then adds 8, to get 22, so by extension the next number is 22 + 10. The number being added to the previous number in the sequence starts at 4 and rises by 2 each time.
94
find the missing number 8-4-9 14-5-2 18-1-blank?
57
Find the missing number in the series (in red) :2 , 4 , 5, 9, 9 , 16 , 14 , ? , 20 , ….
2
22
-3
4
16. 1 is added to the difference each time: 1 + 1 = 2 2 + 2 = 4 4 + 3 = 7 7 + 4 = 11 11 + 5 = 16 [the missing number] 16 + 6 = 22
30 + 4 4 + 30 20 + 14 14 +20 12 + 22
Points: (-4, -14) and (-22, 9) Midpoint: (-4-22)/2, (-14+9)/2 => (-13, -2.5)