Question
Find the sum of the first 10 natural
numbers.Solution
Sum of first 'n' natural numbers = n(n + 1) ÷ 2
Required sum = 10 × (10 + 1) ÷ 2 = 10 × 11 ÷ 2 = 55
More No. System Questions
- Select the number from among the given options that can replace the question mark (?) in the following series.
17, 18, 22, 31, 47, ___ - Select the letter-pair that can replace the question mark (?) in the following series?
FK, HM, LQ, RW, ZE, ? - Which letter-cluster will replace the question mark (?) in the following series?
NPQR, OORQ, PNSP, ____, RLUN - Which letter-cluster will replace the question mark (?) in the following series?
RGV, UME, ?, AYW, DEF - Which letter and number cluster will replace the question mark (?) to complete the given series?
LT6, KU12, IW24, FZ48, ____ - Select the number that can replace the question mark (?) in the following series.
24, 28, 37, 53, 78, ? - A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
57, 59, 56, 61, 54, ___
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