Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 2)
2.
(112 x 54) = ?
Answer: Option
Explanation:
| (112 x 54) = 112 x |  |
10 |  |
4 | = | 112 x 104 | = | 1120000 | = 70000 |
| 2 | 24 | 16 |
Discussion:
126 comments Page 8 of 13.
Aravinth said:
10 years ago
Normal multiplication is easy methods.
Aaisha said:
10 years ago
Simply by calculator,
112*5^4=70000.
112*5^4=70000.
RAVI KANT said:
10 years ago
Multiplication of a number by 5^n: Put n zeros to the right of the multiplicand and divide the number so formed by 2^n.
So (112 x 5^4) = 1120000/2^4 = 1120000/16 = 70000.
Note: It is only apply for 5^n.
Thank you.
So (112 x 5^4) = 1120000/2^4 = 1120000/16 = 70000.
Note: It is only apply for 5^n.
Thank you.
(1)
Manohar said:
10 years ago
@Shefali you nailed it. Just count the power of 5, and that many zeros have to be in answer.
Shakila said:
10 years ago
Using the calculator we got the easy calculation.
(112*5*5*5*5) = 70000.
(112*5*5*5*5) = 70000.
Bhupendra said:
10 years ago
It's so simple.
= 16x7x5^4.
= 7x (2^4x5^4).
= 7x (2x5) ^4 = 70000.
= 16x7x5^4.
= 7x (2^4x5^4).
= 7x (2x5) ^4 = 70000.
Shefali said:
10 years ago
We can simply check the number of zeros by determining the number of 5's.
Here, number of 5 = 4.
So, the answer will must have 4 zeros in last! So, here the answer will be 70000!
Here, number of 5 = 4.
So, the answer will must have 4 zeros in last! So, here the answer will be 70000!
Siva said:
1 decade ago
We can use simple method:
5^4 = 5*5*5*5 = 625.
Then this to multiply with 112.
You can easily get answer 112*625 = 70000.
5^4 = 5*5*5*5 = 625.
Then this to multiply with 112.
You can easily get answer 112*625 = 70000.
Yekambaram said:
1 decade ago
I want best method.
Sindhu said:
1 decade ago
This is simple method.
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