Question
Download Solution PDFWhich of the following numbers is divisible by both 4 and 9?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFFormula Used:
A number is divisible by 4 if the last two digits form a number divisible by 4.
A number is divisible by 9 if the sum of its digits is divisible by 9.
Calculation:
Option 1: 4512
Last two digits: 12
12 ÷ 4 = 3 (divisible by 4)
Sum of digits: 4 + 5 + 1 + 2 = 12
12 ÷ 9 = 1.33 (not divisible by 9)
Option 2: 3241
Last two digits: 41
41 ÷ 4 = 10.25 (not divisible by 4)
Option 3: 2345
Last two digits: 45
45 ÷ 4 = 11.25 (not divisible by 4)
Option 4: 1728
Last two digits: 28
28 ÷ 4 = 7 (divisible by 4)
Sum of digits: 1 + 7 + 2 + 8 = 18
18 ÷ 9 = 2 (divisible by 9)
Therefore, the correct option is Option 4: 1728.
Last updated on Jun 2, 2025
-> The Railway Recruitment Board has released the RPF Constable 2025 Response Sheet on 24th March 2025. As per the official notice, the RPF Constable Answer Key will be available from 24th March 2025 to 29th March 2025.
-> The RRB ALP 2025 Notification has been released on the official website.
-> The Examination was held from 2nd March to 18th March 2025. Check the RPF Exam Analysis Live Updates Here.
-> RPF Constable 2025 application status was released in January 20, 2025.