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30+31+25 \sqrt {{30 }+ \sqrt {{31}+\sqrt{25}}}

A4

B5

C6

D7

Answer:

C. 6

Read Explanation:

30+31+25\sqrt{30+\sqrt{31+\sqrt25}}

=30+31+5=\sqrt{30+\sqrt{31+5}}

=30+6=\sqrt{30+6}

=36=\sqrt36

=6=6


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