Problem Solving : 8

Problem Solving

Example-8

Question

If X and Y are prime numbers, which of the following can not be the sum of X and Y?

(A) 5

(B) 9

(C) 13

(D) 16

(E) 23

Analysis

The prime numbers less than 23 are1, 2, 3, 5, 7, 11, 13, 17 and 19. The choices 5,9,13 and 16 can be written as [2+3], [2+7], [2 +11] and [5+11]. It is only 23 which can be the sum of two prime numbers.

So, (E) is the answer.

Next Question

Previous Question

GMAT : Model Questions Index

HOME PAGE


Home Confused Words What is NEW? Search THIS Site Nursery Rhymes Beauties of English Grammar Intermediate Level Advanced English f.a.q Tips Plain English Vocabulary Etymology Synonyms Antonyms TOEFL GRE GMAT Your English Teacher Business Letters Difficult Words Social Letters Short Stories English Poems Poem Topics TOP 100 Poems English Songs Famous Quotations Business Dictionary Essays Subscribe To This Site	Problem Solving Example-8 Question If X and Y are prime numbers, which of the following can not be the sum of X and Y? (A) 5 (B) 9 (C) 13 (D) 16 (E) 23 Analysis The prime numbers less than 23 are1, 2, 3, 5, 7, 11, 13, 17 and 19. The choices 5,9,13 and 16 can be written as [2+3], [2+7], [2 +11] and [5+11]. It is only 23 which can be the sum of two prime numbers. So, (E) is the answer. Next Question Previous Question GMAT : Model Questions Index HOME PAGE	Follow These Links!

Problem Solving

Follow These Links!