Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
96 views
in Number System by (18.3k points)
closed by

Which of the following is divisible by 99? 

A) 114345 

B) 3572406 

C) 913462 

D) 135792

2 Answers

+1 vote
by (57.0k points)
selected by
 
Best answer

Correct option is (A) 114345

A number is divisible by 99 if it is divisible by both 11 & 9.

A number is divisible by 9 if sum of its all digits is divisible by 9 and a number is divisible by 11 if difference of the sum of odd digits and the sum of even digits is either 0 or multiple of 11.

(A) 114345

Sum of digits = 1+1+4+3+4+5 = 18 is divisible by 9.

\(\therefore\) 114345 is divisible by 9.

Sum of digits at odd places = 1+4+4 = 9.

Sum of digits at even places = 1+3+5 = 9.

Difference = 9 - 9 = 0

\(\therefore\) 114345 is divisible by 11.

\(\because\) 114345 is divisible by both 9 & 11.

\(\therefore\) 114345 is divisible by 99.

(B) 3572406

Sum of digits at odd places = 3+7+4+6 = 20.

Sum of digits at even places = 5+2+0 = 7.

Difference = 20 - 7 = 13 not divisible by 11.

\(\therefore\) 3572406 is not divisible by 11.

\(\therefore\) 3572406 is not divisible by 99.

(C) 913462

Sum of digits = 9+1+3+4+6+2 = 25 is not divisible by 9.

\(\therefore\) 913462 is not divisible by 9.

\(\therefore\) 913462 is not divisible by 99.

(D) 135792

Sum of digits at odd places = 1+5+9 = 15.

Sum of digits at even places = 3+7+2 = 12.

Difference = 15 - 12 = 3 is not divisible by 11.

\(\therefore\) 135792 is not divisible by 11.

\(\Rightarrow\) 135792 is not divisible by 99.

+1 vote
by (18.7k points)

Correct option is  A) 114345

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...