Start learning →

1 এবং 20-এর মধ্যে কতগুলি মৌলিক সংখ্যা রয়েছে?

A7
B8
C9
D6
Answer & Solution
Correct answer: B. 8
1 এবং 20-এর মধ্যকার মৌলিক সংখ্যাগুলি হলো 2, 3, 5, 7, 11, 13, 17 এবং 19। মোট সংখ্যা = 8।
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?What is the place value of 5 in the number 25,489?Which of the following numbers is divisible by 9?What is the sum of the first 10 natural numbers?