HSPT Quantitative : How to work with number series
Study concepts, example questions & explanations for HSPT Quantitative
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Example Questions
Example Question #161 : How To Work With Number Series
What is the next number in the sequence?
17, 27, 38, 50, 63, 77, _______
The pattern is to add (x + 1).
In the beginning of the sequence, x equals 9.
Example Question #162 : How To Work With Number Series
What is the next number in this sequence?
55, 54, 56, 53, 57, 52, _______
There are two ways to look at this pattern.
First, the pattern could be viewed as:
-1, +2, -3, +4, -5, +6
Secondly, you could view the sequence as two separate, alternating patterns.
Pattern A (55, 56, 57) and Pattern B (54, 53, 52). In this case, Pattern A increases by 1 each time; Pattern B decreases by 1 each time.
Example Question #163 : How To Work With Number Series
What number comes next in the sequence?
2, 12, 7, 17, 12, 22, ________
The pattern is add 10, then subtract 5.
Example Question #164 : Number Series*
What number comes next in the sequence?
7, 14, 11, 22, 19, ____________
The pattern is multiply by 2, then subtract 3.
Example Question #164 : How To Work With Number Series
What number should come next in the sequence?
120, 60, 180, 90, 270, ________
The pattern is divide by 2, then multiply by 3.
Example Question #165 : How To Work With Number Series
What number should come next in this series?
1, 7, 11, 13, 17, 23, 27, _____
The pattern fluctuates between adding 2, adding 4, and adding 6. Each time you reach the number 2 or 6, you reverse course. Think of it like a snake: add 6, add 4, add 2, add 4, add 6, add 4, add 2, etc.
Example Question #167 : Number Series*
What number comes next in the series?
75, 70, 85, 80, 95, 90, _____
The pattern is to subtract 5, then add 15.
Example Question #164 : How To Work With Number Series
What number comes next in the series?
11, 15, 24, 40, 65, _____
The pattern is to add 
Now
Example Question #165 : How To Work With Number Series
What number comes next in the series?
47, 94, 74, 148, _____
The pattern is to multiply by 2, then subtract 20.
The last two given numbers in the series were 74 and 148.
Since 
Example Question #166 : How To Work With Number Series
What number comes next in the series?
11, 7, 21, 17, 51, _____
The pattern is to subtract 4, then multiply by 3.
The last two given numbers in the series were 17 and 51.
Since 
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