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If 1957-a9=18b8 Then the sum of the digi...

If `1957-a9=18b8` Then the sum of the digits a and b is

A

13

B

12

C

15

D

14

Text Solution

Verified by Experts

The correct Answer is:
D
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ARIHANT PUBLICATION PUNJAB-NUMBER SYSTEM-Chapter Exercise
  1. When half of a number is increased by 15, the result is 39. The sum of...

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  2. A fraction is equaivalent to 5/8 .its denominator andd numerator add ...

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  3. If 1957-a9=18b8 Then the sum of the digits a and b is

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  4. The product of two whole numbers is 24. The smallest possible sum of t...

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  5. The value of 0.001 + 1.01 + 0.11 is

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  6. The number n is doubled and then y is added to it. The result is, then...

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  7. Numbers (-11)/(20), (7)/(-15), (17)/(-30) and (-3)/(10) are written in...

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  8. What should be subtracted from (-5)/(7) to get -1 ?

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  9. In standard form, the number 829030000 is written as Kxx10^(8) where ...

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  10. If x is an integer, then (x + 1)^(4) - (x-1)^(4) is always divisible b...

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  11. The hundred digit of a three digit number is 7 more than the unit digi...

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  12. If a, b and c are different integers such that a lt b lt c lt 0, then ...

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  13. What number should be subtracted from (-5)/7 to get (-2)/3?

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  14. Which one of the following statements is correct ?

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  15. Find all possible values of y for which 4-digit number 51y3 is divisi...

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  16. The product of integers between -7 and -3 is

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  17. The value of 1 + (11)/(10) + (11)/(100) + (111)/(1000) + (111)/(10000)...

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  18. In standard form, 0.00001278 is expressed as k xx 10^(n). The value of...

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  19. The difference between the greatest and smallest fraction amongst (6)/...

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  20. The value of 4 + (44)/(10) + (404)/(100) + (444)/(1000) + (4)/(10000) ...

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