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 3 of 13.
Priya said:
1 decade ago
112*5^4 = (100+12) *625.
Use formula (a+b) *c = (a*c) + (b*c).
(100+12) *625 = (100*625) + (12*625).
= 62500+7500.
= 70000.
Use formula (a+b) *c = (a*c) + (b*c).
(100+12) *625 = (100*625) + (12*625).
= 62500+7500.
= 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.
Ananya said:
1 decade ago
112 x 5^4 = (2^4 * 7) * 5^4
= 2^4 * 5^4 * 7
= (2*5)^4 * 7
= 10^4 * 7
= 70000
= 2^4 * 5^4 * 7
= (2*5)^4 * 7
= 10^4 * 7
= 70000
(1)
Js parihar said:
7 years ago
By digit sum it can be more easier:
112 * 625 = 4 * 13 = 4 * 4 =>16 = 7.
digit sum of option will be;
70000 = 7.
112 * 625 = 4 * 13 = 4 * 4 =>16 = 7.
digit sum of option will be;
70000 = 7.
(1)
Teju said:
1 decade ago
In simple Method we can solve this problem Like:
5 to the power of 4 means 5*5*5*5 = 625.
625*112 = 70000.
5 to the power of 4 means 5*5*5*5 = 625.
625*112 = 70000.
Ravi Kiran said:
7 years ago
5----2^1,
5*5------2^2=4,
5*5*5------2^3=8,
5*5*5*5-----2^4=16,
Then simply,
112/16=7 and then it is 70000.
5*5------2^2=4,
5*5*5------2^3=8,
5*5*5*5-----2^4=16,
Then simply,
112/16=7 and then it is 70000.
Vaibhav said:
7 years ago
This method is quite easy to solve;
112 * 625.
= 100*625+10*625+2 * 625,
= 62500 + 6250 + 1250,
= 70000.
112 * 625.
= 100*625+10*625+2 * 625,
= 62500 + 6250 + 1250,
= 70000.
(1)
Mahi said:
7 years ago
The Simple trick is;
Highest power is 4 therefore answer will be the option having 4 zeros i.e. 70000.
Highest power is 4 therefore answer will be the option having 4 zeros i.e. 70000.
Pradnya said:
1 decade ago
We can also use simple method by using multiplication.
i.e.,
5^4=5*5*5*5=625.
Then,
112*625=70000.
i.e.,
5^4=5*5*5*5=625.
Then,
112*625=70000.
Karthik Sonegara said:
8 years ago
Can anybody help me with this!
My query is that why do we consider 5^4 when the question says 54?
My query is that why do we consider 5^4 when the question says 54?
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