Question

without actual adding find sum
1+3+5+7+9+11+13+15+17+19+21+23
​

Answer 1

Answer:

144

Step-by-step explanation:

Total consecutive odd numbers = 12

Thus n = 12

Therefore sum = n2

= 12*12 = 144

Answer 2

Answer:

i) Total consecutive odd numbers = 5

Thus n = 5

Therefore sum = n2

= 5*5 = 25

ii)

Total consecutive odd numbers = 10

Thus n = 10

Therefore sum = n*n

= 10*10 = 100

iii)

Total consecutive odd numbers = 12

Thus n = 12

Therefore sum = n*n

= 12*12 = 144

Step-by-step explanation:

hope it helps :)

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