SOLUTION: What is the missing number in this sequence? 60, 57, 51,

SOLUTION: What is the missing number in this sequence? 60, 57, 51, _, 30

Question 550073: What is the missing number in this sequence?
60, 57, 51, _, 30
Answer by prateekagrawal(56) (Show Source): You can put this solution on YOUR website!
Here the differences are.. 60-57= 3
57-51=6
and so on.
so, next difference should be 9.
51-9= 42
so, the missing number is 42.
Check: next difference must be 12.
so, 42-12= 30.
so, this is satisfying also.
Hence missing term is 42.
.
I hope this will help you. :)
.
Regards,
Prateek Agrawal
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