Start learning →

پہلے 10 قدرتی نمبروں کا مجموعہ کیا ہے؟

A45
B50
C55
D60
Answer & Solution
Correct answer: C. 55
پہلے n قدرتی نمبروں کا مجموعہ = n(n+1)/2 = 10 * 11 / 2 = 55۔
Practise this question with Quill — RRB NTPC →

Keep practising Number System

Browse all Number System questions for RRB NTPC, or explore more Mathematics topics.

Start a Number System lesson →
Related questions
RRB NTPC · Number Values and CountsRRB NTPC · Integer Divisibility RulesRRB NTPC · Classifying Basic NumbersWhich of the following is a composite number?When a number is divided by 8, the quotient is 12 and remainder is 5. What is the number?How many prime numbers are there between 1 and 20?What is the place value of 5 in the number 25,489?Which of the following numbers is divisible by 9?