Q461. What is the sum of first 10 odd natural numbers?
- 55
- 110
- 100
- 90
Show answer and explanation
Correct answer: C. 100
The sum of first n odd numbers is n^2.
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Correct answer: C. 100
The sum of first n odd numbers is n^2.
Correct answer: A. 10
6x = 60, so x = 10.
Correct answer: A. 1000
10^3 = 1000.
Correct answer: D. 42
Perimeter = 2(l+b) = 42.
Correct answer: B. 27
Parts = 4; each part = 9; larger share = 27.
Correct answer: A. 120
Distance = speed x time = 120 km.
Correct answer: A. 60
40% of 150 = 40/100 x 150 = 60.
Correct answer: B. 96
TSA = 6 x side^2 = 96.
Correct answer: C. 375
SP = 500 x 75/100 = 375.
Correct answer: D. 1960
98 x 20 = 1960.