Question

In the sequence: 67, 55, 46, 34, 25,…, what number should come next?

a) 16
b) 13
c) 15
d) 19

Answer 1

b) 13

Explanation:

67 - 12 = 55

55 - 9 = 46

46 - 12 = 34

34 - 9 = 25

pattern: subtract 12, subtract 9

the pattern tells us to subtract 12, so take take 25 and subtract 12 from it:

25 - 12 = 13

Answer 2

b) 13

Explanation:

67 - 55 = 12

55 - 46 = 9

46 - 34 = 12

34 - 25 = 9

25 - x = 12

rearrange that so,

25 - 12 = x

x = 13