Mark (✓) against the correct answer

Question:

Mark (✓) against the correct answer

If 6x5 is exactly divisible by 9, then the least value of x is

(a) 1

(b) 4

(c) 7

(d) 0

Solution:

(c) 7

When a number is divisible by 9, the sum of the digits is also divisible by 9.

$6+x+5=11+x$

To be divisible by 9 :

$11+x=18 \Rightarrow x=7$

 

Leave a comment

Close
faculty

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now