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If a and b are two integers which are mu...

If a and b are two integers which are multiples of 5 which of the following is not necessarily true :

A

`x^(2) + y^(2)` is divisible by 5

B

`(x-y)` is divisible by 5

C

xy is divisible by 25

D

(x + y) is divisible by 10

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The correct Answer is:
D
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ARIHANT PUBLICATION PUNJAB-NUMBER SYSTEM-Chapter Exercise
  1. By which of the following, 787878 is not divisible ?

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  2. A number 774958 N(1) 96 N(2) to be divisible by 8 and 9, the values of...

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  3. If a and b are two integers which are multiples of 5 which of the foll...

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  4. what should come in place of 'x' so that the number 873 x 24 is divisi...

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  5. 16^(5)+2^(15) is divisible by

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  6. If 5432*7 is divisible by 9, then the digit in place of * is

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  7. If 78*3945\ is divisible by 11, where * is a digit, then * is equa...

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  8. A number when divided by 280 leaves 115 as remainder. When the same nu...

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  9. The number which can be written in the form of n (n+1) (n+ 2), where n...

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  10. Find the remainder in expression– (2581 xx (2862)^(2) xx (2873)^(3))...

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  11. 25^(25) is divided by 26, the remainder is 1 (b) 2 (c) 24 (d) 25

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  12. Write 94 in roman system.

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  13. Write 493 in roman system.

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  14. If x = (2)/(3) and y = (3)/(4), then a rational number (x-y)^(-1)+(x^(...

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  15. Sum and difference of two numbers are 25 and 15 respectively. The grea...

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  16. The unit digit in the product (122)^(173) is

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  17. The digit in unit's place of the product 81 xx 82 xx 83 xx... xx 89 is

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  18. Find the unit digit in the product 268 xx 732.

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  19. Find the unit digit in the product of (268 xx 539 xx 826 xx 102).

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  20. Find the unit digit in (6^(36))^(84).

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