How to solve Missing Numbers Questions: Tips and Tricks Ssc cgl exam 2017 Easy maths tricks for missing numbers Finding Missing Numbers To find a missing number, first I will have to find a Rule behind the Sequence. Sometimes I can just look at the numbers and see a pattern: Example: 1, 4, 9, 16, ? AnsIr: they are Squares (1 2 =1, 2 2 =4, 3 2 =9, 4 2 =16, …) Note: I told you they are squares, but if it didn’t hit your mind…you need practice. Now see the following rule. Rule: x n = n 2 Sequence: 1, 4, 9, 16, 25, 36, 49, … Did you notice how I wrote that rule using “x” and “n” ? x n means “term number n”, so term 3 is written x 3 And I also used “n” in the formula, so the formula for term 3 is 3 2 = 9. This could be written x 3 = 3 2 = 9 is not it? Once I master this Rule I can use it to find any term. For example, the 25th term can be found by “plugging in” 25 wherever n is. x 25 = 25 2 = 625 Click here to see the video Click he
