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Mathematics

The sum of first 10 even whole numbers is

  1. 110

  2. 90

  3. 55

  4. 45

AP GP

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Answer

The first 10 even whole numbers are 0, 2, 4, 6, 8, 10, 12, 14, 16 , 18.

Sum of an A.P. is given by,

Sn=n2(a+l)S10=102(0+18)=5×18=90.Sn = \dfrac{n}{2}(a + l) \\[1em] \therefore S{10} = \dfrac{10}{2}(0 + 18) \\[1em] = 5 \times 18 \\[1em] = 90.

Hence, Option 2 is the correct option.

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