Mathematics
Grade-4-
Easy
Question
What number is missing in the pattern
______ 145, 256, __?__, 478, _____?
- 267
- 367
- 287
- 387
Hint:
We are given a number series with first, fourth and sixth terms missing. We are asked to find the fourth term. We have to find the rules used to write the series. Using the rule, we will find the required value.
The correct answer is: 367
The given sequence is __, 145, 256, __, 478, __
We will find the rule used to write the sequence.
We will subtract the second term from the third term
We will see if we get a constant that we can use to write the complete pattern.
256 – 145 = 111
Now, we will add this constant from the third term. And, we will continue the process till we find the fifth term. If the fifth term matches the given sequence, then the rule we used is correct.
256 + 111 = 367
367 + 111 = 478
This matches the fifth term of given sequence. So, we used the right rule.
So, the fourth term is 367.
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.
