What is the next number? 5, 31/2 ,2,__________?
Answers:
5 - 1.5 = 3.5
3.5 - 1.5 = 2
2 - 1.5 = 0.5
So the answer is 1/2
is half
Probably 1/2. The difference between the first three numbers is 1 1/2, so take off another from 2.
is 31/2 3.5 or 15.5?
1/2?
your that lame that you can't do it yourself its so simple to figure out.
1/2 seems obvious - but there has to ba a catch somewhere!
1/2
I assume it is 1/2, since this was a question asked on an IQ test.
This is an Arithmetic progression, a sequence of numbers such that the difference of any two successive members of the sequence is a constant.
The formula to use is:
an = a1 + (n-1)d
where: an is the nth number
a1 is the first number in the progression
d is the common difference
so from your question,
a1 = 5
d = -1 1/2 or -1.5 (since the sequence is decreasing)
n = 4 (4th number in th sequence)
substitute:
an = a1 + (n -1) d
a4 = 5 + (4 - 1) (-1.5)
a4 = 5 + (-4.5)
a4 = 0.5 or 1/2
Of, course, once you know the common difference, you can just subtract that from each term.
The formula is helpful if you're looking for a lot of numbers, like if you're required to look for the 100th term in the sequence.
is half
the series is an arithmetic progression with a common difference of -1.5
So, 5, 3.5, 2, 0.5
The next number is 1/2.
the anwer is 1/2
5 = 10/2
3 and a 1/2 = 7/2
2 = 4/2
10/2 - (3/2) = 7/2, 7/2 - (3/2) = 4/2, so 4/2 - (3/2) = 1/2
Boy i figured this out in seconds.
1/2
The answers post by the user, for information only, UKQnA.com does not guarantee the right.