PDF chapter test TRY NOW
Fill in the following surprise number as per the instruction :
Pick the number from the dropdown:
Double the picked number: \(×\) \(=\)
Again double it: \(×\) \(2 =\)
Add the number you picked first to the answer: \(+\) \(=\)
Now again double it: \(×\) \(2 =\)
Divide by \(10\): \(10 =\) .
Hurray!!!
Both the start and end numbers are the same....
How it works? Let's see the explanation.
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