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Counting Patterns within 1000

Consider the number pattern given below:
 

11 13 15  ?  19 21


Let's identify the missing number.

Notice that the numbers are increasing.

To find the missing number, let’s find the rule first.

Observe that:

11 + 2 = 13

13 + 2 = 15
 

So, the rule is “Count forward by 2”.
 

11 + 2 = 13

13 + 2 = 15

15 + 2 = 17

17 + 2 = 19

19 + 2 = 21

 

So, the missing number is 17.





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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.

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