Question

1) what is the sum of first ten odd numbers?
a) 20
b)50
c) 55
d)100​

Answer 1

Answer:

d) 100

Step-by-step explanation:

The first 10 odd numbers are - 1, 3, 5, 7, 9, 11, 13, 15, 17,19

1 + 19 = 20

20 × 5 = 100 ( there are 10 odd numbers in the series, so half of them would be 5.)

Thus the sum is 100

Answer 2

THERE ARE TWO WAYS TO ANSWER ✅✅✅ :

1. The first 10 odd no.s ---> 1, 3, 5, 7, 9, 11, 13, 15, 17, 19

                                       =1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19

                                       = 100

OR

2. By applying odd no. theorem = n x n (no. of odd no.s)

                                                     = 10 x 10

                                                     = 100

Hope helps!!

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---SciFi273