Mathematics
Grade-4-
Easy
Question
Which number is missing in the number sequence?
- 66
- 56
- 58
- 50
Hint:
We are given a number sequence. There are four terms in the sequence. The third term is missing. We are asked to find the third term. We have to find the used to write the number sequence. Using the rule, we can find the missing term.
The correct answer is: 58
The given sequence is 78, 68, __, 48
We will subtract the second term from first term. We will see if we find a constant, which will help us to write all the terms.
78 – 68 = 10
Now, we will subtract this value from the second term. We will continue the process till we get the last term. If the term matches the given sequence, then our rule is correct.
68 – 10 = 58
58 – 10 = 48
This matches the fourth term. It means the rule used is to subtract 10.
The complete sequence is 78, 68, 58, 48
Therefore, the missing term is 58.
For such questions, we should know the basic operations. When the rule used to write the pattern is not mentioned, we have to use all four operations to check the pattern. The operations are addition, subtraction, division, and multiplication.
