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താഴെക്കാണുന്നവയിൽ പൂർണവർഗ്ഗ സംഖ്യയല്ലാത്തത് എന്ത് ?

A81

B91

C361

D121

Answer:

B. 91

Read Explanation:

92=819^2=81

192=36119^2=361

112=12111^2=121


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