Aptitude  Number series  Practice Q&A

31. $\left(51+ 52 + 53 + ... + 100\right)$ = ?

2525 2975 3225 3775

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32. 1904 x 1904 = ?

3654316 3632646 3625216 3623436

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33. 1 + 2 + 3 + … + 40 = ?

760 780 800 820

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34. What is sum of first 17 natural numbers?

160 193 153 148

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35. Find the sum of first 25 natural numbers.

325 225 300 425

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36. Find the sum of first 100 natural numbers.

4550 5050 6050 6550

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37. Find the sum of first 25 even numbers.

550 600 625 650

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38. Find the sum of first 100 even numbers.

10000 10100 11000 11100

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39. Find the sum of first 20 odd numbers.

200 400 600 100

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40. Find the sum of first 500 odd numbers.

300000 25000 250000 30000

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