Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 16)
16.
If the number 517*324 is completely divisible by 3, then the smallest whole number in the place of * will be:
Answer: Option
Explanation:
Sum of digits = (5 + 1 + 7 + x + 3 + 2 + 4) = (22 + x), which must be divisible by 3.
x = 2.
Discussion:
52 comments Page 2 of 6.
Ruhi said:
6 years ago
The answer is 1.
(1)
Ann mary said:
6 years ago
Thanks @Nikitha.
Manu said:
7 years ago
Thank you @Nithya.
Surya said:
7 years ago
Well done @Nikitha.
Mridul said:
7 years ago
@All.
The rule which one is applied here is only applicable for 3, not for 4 or 5 etc.
The rule which one is applied here is only applicable for 3, not for 4 or 5 etc.
Debashish said:
7 years ago
According to you guys if a number is divisible by another number then sum of its all digits also divisible. But it's not true in all cases.
e.g. The number is 625 which is divisible by 5. But if we add all its digits 6+2+5=13 which is not divisible by 5.
So this principle is wrong.
e.g. The number is 625 which is divisible by 5. But if we add all its digits 6+2+5=13 which is not divisible by 5.
So this principle is wrong.
(1)
Dev said:
8 years ago
Let the two numbers be a and b(a>b)
So A. T. Q
a-b=1365-----> [ eq no(1)]
Also;
b)a (6
- 6b
_____
15
______
Therefore;
From above we can say
a-6b=15-----> [eq no(2)]
Solving both equations we get;
b= 270[as per required].
Thanks.
So A. T. Q
a-b=1365-----> [ eq no(1)]
Also;
b)a (6
- 6b
_____
15
______
Therefore;
From above we can say
a-6b=15-----> [eq no(2)]
Solving both equations we get;
b= 270[as per required].
Thanks.
Fufh said:
8 years ago
But we can add all numbers.
Saravanan said:
8 years ago
@Aravind
456*85.
1. 4+5+6+x+8+5=28+x
2. 28+10(A is given option )=38/3=12.66 ஃ A is No
3. 28+84=112/3=37.333. No
4. 28+12=/3=13.33. No
5.28+21=16.33. No
Ans: None of those
But.
28+2=30/3=10. Ans is 2.
456*85.
1. 4+5+6+x+8+5=28+x
2. 28+10(A is given option )=38/3=12.66 ஃ A is No
3. 28+84=112/3=37.333. No
4. 28+12=/3=13.33. No
5.28+21=16.33. No
Ans: None of those
But.
28+2=30/3=10. Ans is 2.
(1)
Vishnu said:
8 years ago
Good, thanks @Nikitha.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers