Subject: General Aptitude · Chapter: Problems on Numbers · Exam: · Marks: · Difficulty:
What is the two-digit number? (Bank P.O., 2009) I. Sum of the digits is 6. II. Digit in the ten’s place is double the digit in the unit’s place.
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Let the ten’s and unit’s digits be x and y respectively. I. x + y = 6 …(i) II. x = 2y …(ii) Solving (i) and (ii), we get : x = 4, y = 2. So, the required number is 42. Thus, both I and II together give the answer. \ The correct answer is (e).
Explanation as extracted from the printed page; notation may be imperfect.