Download OU B.Sc 2019 June-July 4th Semester 3120 Mathematics Question Paper

Code No. 3120/E

FACULTY OF SCIENCE

V-Semester (CBCS) Examination, May / June 2019

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Subject : Mathematics

Paper— IV (SEC- 2) : (Number Theory)

Note : Answer ALL the questions.

PART—A (2x5=10 Marks)

(Short Answer Type)

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1. Prove that there are infinitely many primes of the form 4n + 3.
2. If the sum 1+2+3+...+100 is divided by 6, find the remainder.
3. If P is a prime and k > 0 then prove that f(P^k)=P^k — P^k-1
4. Prove that the function f is a multiplicative function.

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