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If 38 # 49 = 24 and 96 # 51 = 21, then 8...

If 38 # 49 = 24 and 96 # 51 = 21, then 87 # 78 = ?

A

26

B

21

C

28

D

30

Text Solution

Verified by Experts

The correct Answer is:
D
`36#49=24`
`rArr 3+8+4+9=24`
`96#51=21`
`rArr9+6+5+1=21`
Therefore,
`84#78`
`rArr 8+7+7=830`
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Ex.-1 Q.21 to 51

KIRAN PUBLICATION-SYMBOLS & NOTATIONS-TYPE-II
  1. Choose the appropriate combination of signs to solve the equation. ...

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  2. A**B means multiply A by B, A"@"B means divide A by B, A? B means add ...

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  3. If 37**14=17, 69**33=34, 91**125=72 then what should be 28**56=?

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  4. If 5xx3 = 19 and 8xx 5 = 49, then what should 6xx4 be? यदि 5xx3 = 1...

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  5. Complete the third equation on the basis of a certain system followed ...

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  6. If 4**2=3 and 8**4=3, then 21**7=?

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  7. If 3**4=10,5**8=18,7**7=?

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  8. Select the correct combination of mathematical signs to replace * sign...

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  9. If 1**2=1,2**3=-1 and 3**4=-5, then find the value of 7**9=?

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  10. Some equations are solved on the basis of certain system. Find out the...

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  11. Some equations have been solved on the basis of a certain pattern. Fin...

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  12. If 13**45=29,24**58=41,74**32=53, what should 97**47 be?

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  13. Some equations have been solved on the basis of a certain pattern. Fin...

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  14. Some equations are solved on the basis of a certain system. Find out t...

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  15. If 38 # 49 = 24 and 96 # 51 = 21, then 87 # 78 = ?

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  16. If 27 * 4 = 77 and 31 * 9 = 239, then 21 * 6 = ?

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  17. If 17 ** 36= 17 and 41 ** 56= 16 then 41 * 32= ?

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  18. If (2)**4=2 and (4)**4=16, then what is the value of A in (6)**A=18?

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  19. If 6**9-4=58 and 3**9-7=34, then in expression A**4-9=91, what is the ...

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  20. If 4**7**2=361 and 5**9**1=480, then 2**1**3=?

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