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The notation of set of natural numbers is denoted by 

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Important Questions on Real Numbers

HARD
Mathematics>Arithmetic>Real Numbers>Basics of Number System
Let a and b be natural numbers such that 2a-b, a-2b and a+b are all distinct squares. What is the smallest possible value of b ?
HARD
Mathematics>Arithmetic>Real Numbers>Basics of Number System
Let E denote the set of all natural numbers n such that 3<n<100 and the set {1,2,3,……,n} can be partitioned into 3 subsets with equal sums. Find the number of elements of E.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
How many times does the digit 2 occurs between 1 to 100.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System

Write the quadrants in which the following points lie:

-4,7

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Mathematics>Arithmetic>Real Numbers>Basics of Number System
The smallest natural number is _____.
 
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Every whole number is a natural number, true or false.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Every integer is a natural number.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Natural number is denoted by_____
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Write the third natural number after 10999.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
In the number 545, find the place value of both the  5's .Also find their difference.
MEDIUM
Mathematics>Arithmetic>Real Numbers>Basics of Number System

Observe the number line.

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Write the natural numbers shown in the above number line. 

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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Draw the number line and mark the natural numbers up to 9 .
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Sum of first 10 odd natural numbers is _____.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System

Negative natural numbers are integers.

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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Every natural number is whole number, true or false.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
The natural number 1 has no predecessor.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Represent 85 and -85 on the number line.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System
Write the next five natural numbers after 321076.
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Mathematics>Arithmetic>Real Numbers>Basics of Number System

The smallest counting number is _____.

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Mathematics>Arithmetic>Real Numbers>Basics of Number System
 Zero is the smallest natural number