Subject: General Aptitude · Chapter: Number System · Exam: · Marks: · Difficulty:
How many numbers will be there between 300 and 500, where 4 comes only one time? [UPSSSC Lower Subordinate (Pre.) Exam, 2016]
(a)89
(b)99
(c)110
(d)120
Answer
Answer (as printed): B
Explanation
From 300 to 399, we note that when ‘4’ comes only one time = 19 such instances. From 400 to 499, we note that when ‘4’ comes only one time = 80 such instances. So, total = (19 + 80) = 99 such instances
Explanation as extracted from the printed page; notation may be imperfect.