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Aptitude · Q361

Number System

Competitive Exams · Aptitude · question 361

Q361

Which of the following numbers are completely divisible by 7 ? I. 195195 II. 181181 III. 120120 IV. 891891

A.
Only I and II
B.
Only II and III
C.
Only I and IV
D.
Only II and IV
E.
All are divisible
Answer

Answer: Option E

Solution

Answer: Option E
Solution:
I. We have (195 - 195) = 0
∴ 195195 is divisible by 7

II. We have (181 - 181) = 0
∴ 181181 is divisible by 7

III. We have (120 - 120) = 0
∴ 120120 is divisible by 7

IV. We have (891 - 891) = 0
∴ 891891 is divisible by 7

Hence, all are divisible by 7