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:
125 comments Page 8 of 13.
Umar kce said:
1 decade ago
Our author says easiest way.
Ex: Any no which is multiply by multiples of 5 we can follow these method.
= 187*5= 1870/2 = 935.
i.e, 5^1 = 5. So one zero.
If 125 means 5^3 = 125, so 000 to be added.
How many zero to be added in numerator that much of 2 to be added in denominator?
If 625 means in 1870000/2*2*2*2.
Ex: Any no which is multiply by multiples of 5 we can follow these method.
= 187*5= 1870/2 = 935.
i.e, 5^1 = 5. So one zero.
If 125 means 5^3 = 125, so 000 to be added.
How many zero to be added in numerator that much of 2 to be added in denominator?
If 625 means in 1870000/2*2*2*2.
Aniruddha Wagh said:
1 decade ago
2x5 gives 0 at unit place.
2^2x5^2 gives two zeros at last of number i.e. at unit and tens place.
Similarly for higher power gives respective zeroes at end. Now you can easily solved it. No need for me to solve.
2^2x5^2 gives two zeros at last of number i.e. at unit and tens place.
Similarly for higher power gives respective zeroes at end. Now you can easily solved it. No need for me to solve.
Sindhu said:
1 decade ago
This is simple method.
Yekambaram said:
10 years ago
I want best method.
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:
10 years 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.
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.
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.
Manohar said:
10 years ago
@Shefali you nailed it. Just count the power of 5, and that many zeros have to be in answer.
Aaisha said:
10 years ago
Simply by calculator,
112*5^4=70000.
112*5^4=70000.
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