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Question

025 will form a square of 95. Which digit should replace ?

A
9
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B
8
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C
7
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D
6
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Solution

The correct option is A 9
Multiply ten's digit with its next number.
9×(9+1)=9×10=90(1)
Find the square of unit's digit: 5
52=25 ----(2)
Combining (1) and (2), we get
9025=95×95
So, 9 is the missing number.

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