Question

$\sqrt{16 + \sqrt{25 = } }$
and what is the unit digit of (124)²... please tell me the answer of both questions... and explain
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Answer 1

Answer:

$\sqrt{16 + \sqrt{25 } } = 4 + 5 = 9$

the unit digit for

$(124) {}^{2}$

= 15376.

hence the unit digit is 6

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