ABC26GN0115 · Number System

Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:

The prime numbers dividing 143 and leaving a remainder of 3 in each case are
(a)2 and 11
(b)11 and 13
(c)3 and 7
(d)5 and 7
Answer
Answer (as printed): D
Explanation
Each of the required numbers must divide $(143-3)=140$ exactly. Now, $140=5 \times 7 \times 4$. Hence, the required prime numbers are 5 and 7.

Explanation as extracted from the printed page; notation may be imperfect.

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