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Bank Exam » Bank Exam Study Materials » Quantitative Aptitude » Missing Series
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Missing Series

The Missing Number in the series in maths, Finding The Missing Number in the series in maths, How do you find the missing number in a sequence? Example

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The sequence of numbers below starts with 1 and continues to 6, where it stops without any other numbers in between them, which makes the sequence incomplete. Find the missing number in the series so that you can complete it as an ordered list of numbers starting from 1 to 6.

A missing term in a series is like an incomplete story, which in turn makes it difficult to follow the plot and understand what happened. Fortunately, if you can find that missing term, it will complete the series and make it infinitely easier to understand where it’s going and why it happens when it does. In this blog post, we’ll show you how to find the missing number in any series by adding up its terms one by one. We’ll also talk about some of the problems that can arise when looking at a series, so be sure to read until the end!

The Missing Number in the series  in maths

First, let’s look at the series and see if you can work out the missing term. 1, 2, 3, 4, 5, 6… Do you know where the missing number should go in the series above? If not – don’t worry about it! This isn’t a maths problem – it is a logic problem so just keep reading. Look again to find the missing term in the series that follows: 1, 2, 3, 4, 5, and now 6… What do you notice about these two series?

Finding The Missing Number in the series  in maths

A series of numbers are given and the missing term in the series is required. For example, in the series 1,4,9,16,25 … 40 ? 41 We need to find out what that number is between 6 and 25 which we call ‘missing’ hence called Missing Series. The method of solving a missing term in the series is very simple. We first have to find out where the missing lie lies even after one place value i.e whether we need to insert a zero or not. Let’s take an example like (1,4) here since 4 lies in between 2 & 3 so here all figures before 5 will be +1 else no addition will be made.

How do you find the missing number in a sequence?

This technique for finding a missing number in a sequence relies on the fact that we already know the values of all numbers in the sequence after the missing number. Using those values, we can create another sequence with a different first number that adds up to the original one, which allows us to find our missing number. This method of finding the missing term in a sequence is called telescoping and it’s pretty easy to understand, even if you’re not good at math. First, write down your starting value (X). Next, figure out what number needs to be added to X so that X+n=the next value in your sequence.

Example 

If $1,000 invested in a series of bonds that pay 6 percent and mature five years apart will earn $10,000, what is a missing term in Series: 4% 3 years, 5% 4 years, 8% 6 years? A: 2%. The correct formula to use is 2 + (5 * 1.05) = 11.2 or an interest rate of 11.2 percent on a $1000 investment after 5 years.

Conclusion

The missing series, consisting of the sum of the natural numbers from 1 to infinity, can be represented in many ways, including in this form: formula_1. While we can easily see that this series converges to formula_2, what if we didn’t know that fact? What if we wanted to determine if this series converges or diverges? It turns out that identifying whether an infinite series converges or diverges depends on identifying whether a certain term in the series is missing and then using that term to find the missing number.

faq

Frequently Asked Questions

Get answers to the most common queries related to the Bank Examination Preparation.

How do you find the next number in a series?

Ans : It’s a simple question, but the answer requires an understanding of how series work. Any series has the ...Read full

What is the series formula?

Ans : (x + 2) + (x + 4) + (x + 6) + (x + 8)… In the series above, each term is equal to the sum of the previou...Read full

What is the difference between a sequence and a series?

Ans: A sequence is a list of numbers that follow a pattern, but the difference between a sequence and a series is th...Read full

Ans : It’s a simple question, but the answer requires an understanding of how series work. Any series has the next number in it, but you have to find the missing term in the series before you can use that number. A few minutes with a calculator and pencil should do the trick. If you want to find the value of the next number in a geometric progression, say by using mathematics or formula, you need to know what kind of progression it is first. 

Ans : (x + 2) + (x + 4) + (x + 6) + (x + 8)… In the series above, each term is equal to the sum of the previous two terms. So, the formula is: = ‘n'(1)+(2)(‘n’-1), where ‘n’ is a positive integer. What follows is a list of every missing number from 0 to 5 and the corresponding value of formula (1). Just replace ‘n’ with the appropriate value for that missing term to get each consecutive answer. 0 = 1 1 = 3 2 = 7 3 = 12 4 = 17 5 = 22

Ans: A sequence is a list of numbers that follow a pattern, but the difference between a sequence and a series is that you can add and subtract in a series. For example, if you take the sequence 1, 2, 3 and change it to the series 3 – 1 = 2 + 4 = 6, then you’ve just added one to each number in the series to get its next term. The missing number between 20 and 25 should be 21. More specifically the missing term is 21 because it will be the next term when we sum 25-20 = 5+21=26 which is exactly what 25 was before adding 21. Though there are many mathematical problems out there like these, people often find them difficult or confusing.

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