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Subject :IMO    Class : Class 3

What is the missing number in the box?


A 729
B 689
C 525
D 625


Ans 1:

Class : Class 3

Ans 2:

Class : Class 6

Ans 3:

Class : Class 3
plz explain the how to solve this

Ans 4:

Class : Class 3
Do everthing the opposite like when they said plus do minus

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