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Question 103
What is the value of $$3^{2}+7^{2}+13^{2}+17^{2}-1^{2}-5^{2}-9^{2}-11^{2}-15^{2}$$?
Solution
Expression =Â $$3^{2}+7^{2}+13^{2}+17^{2}-1^{2}-5^{2}-9^{2}-11^{2}-15^{2}$$
= $$(9+49+169+289)-(1+25+81+121+225)$$
= $$516-453=63$$
=> Ans - (D)
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