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1 is the identity for addition of whole ...

1 is the identity for addition of whole numbers.

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The whole number 0 (zero) is called the additive identity or the identity element for addition of whole numbers.

1 is the identity for multiplication of whole numbers.

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NCERT EXEMPLAR-NUMBER SYSTEM-Exercise (true (T) or false (F))
  1. Natural numbers are closed under subtraction.

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  2. Addition is commutative for natural numbers.

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  3. 1 is the identity for addition of whole numbers.

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  4. 1 is the identity for multiplication of whole numbers.

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  5. There is a whole number which when added to a whole number, gives the ...

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  6. There is a natural number which when added to a natural number, gives ...

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  7. If a whole number is divided by another whole number, which is greater...

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  8. Any non-zero whole number divided by itself gives the quotient 1.

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  9. The product of two whole numbers need not be a whole number.

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  10. A whole number divided by another whole number greater than 1 never gi...

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  11. Every multiple of a number is greater than or equal to the number.

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  12. The number of multiples of a given number is finite.

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  13. Every number is a multiple of itself.

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  14. Sum of two consecutive odd numbers is always divisible by 4.

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  15. If a number divides three numbers exactly, it must divide their sum ex...

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  16. If a number exactly divides the sum of three numbers, it must exactly ...

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  17. If a number is divisible both by 2 and 3, then it is divisible by 12.

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  18. State True or False: A number with three or more digits is divisible...

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  19. If the sum of the digits of a number is divisible by 3, then the numbe...

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  20. The LCM of two numbers is 108 and their HCF is 4. If one of the number...

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