The Sum of 1+3+5+7+9+11+13+15+17+19+23+29 is equal to the square of
(a)13
(b)15
(c)12
(d)11
(Instructions : Do it without performing atcual addition. Explanation is needed.)
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c) 12
sum of consecutive odd numbers is equal to the square of numbers added
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a ball thrown vertically upwards returns back to the thrower in 20 seconds, find out the initial velocity with which it was thrown (take acceleration as due to gravity as 10 m/s^2
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