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Subject :IMO    Class : Class 4
think of a number multiply by 2.subtract 10.multiply 5.the result is 100 .what is the number?

Ans 1:

Class : Class 9
15

Ans 2:

Class : Class 4
fifteen\15

Ans 3:

Class : Class 8
15

Ans 4:

Class : Class 9
fifteen/15

Ans 5:

Class : Class 8
do the opposite calculations. 100/5=20 20+10=30 30/2=15

Ans 6:

Class : Class 7
15

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