Aptitude - Numbers - Discussion
Discussion Forum : Numbers - General Questions (Q.No. 7)
7.
(935421 x 625) = ?
Answer: Option
Explanation:
| 935421 x 625 = 935421 x 54 = 935421 x |  |
10 |  |
4 |
| 2 |
| = | 935421 x 104 | = | 9354210000 |
| 24 | 16 |
= 584638125
Discussion:
35 comments Page 1 of 4.
Padagala Murali krishna said:
4 years ago
By using the digital sum method you simply solve that question 935421*625 = ?.
Digital sum of 935421 = 6.
And the digital sum of 625 = 4.
Multiply both digital sums of 935421 and 625 because in the question we have a multiplication symbol then 6*4 is 24 digital sum of 24 is 6.
So, verify in the options there is option B is having digital is 6.
Digital sum of 935421 = 6.
And the digital sum of 625 = 4.
Multiply both digital sums of 935421 and 625 because in the question we have a multiplication symbol then 6*4 is 24 digital sum of 24 is 6.
So, verify in the options there is option B is having digital is 6.
(23)
Raju said:
9 years ago
By logic.
9 + 3 + 5 + 4 + 2 + 1 * 6 + 2 + 5 = 24 + 13,
==> 2 + 4 * 1 + 3 = 6 x 4,
==> 24 = 2 + 4 = 6.
1. 5 + 7 + 5 + 6 + 4 + 8 + 1 + 2 + 5 = 43 => 4 + 3 = 7.
2. 5 + 8 + 4 + 6 + 3 + 8 + 1 + 2 + 5 = 42 => 4 + 2 = 6.
So, option 2 satisfy with the given expression.
Therefore, option 2 is the answer.
9 + 3 + 5 + 4 + 2 + 1 * 6 + 2 + 5 = 24 + 13,
==> 2 + 4 * 1 + 3 = 6 x 4,
==> 24 = 2 + 4 = 6.
1. 5 + 7 + 5 + 6 + 4 + 8 + 1 + 2 + 5 = 43 => 4 + 3 = 7.
2. 5 + 8 + 4 + 6 + 3 + 8 + 1 + 2 + 5 = 42 => 4 + 2 = 6.
So, option 2 satisfy with the given expression.
Therefore, option 2 is the answer.
(3)
Girish said:
6 years ago
If the thousands digit is even, examine the number formed by the last three digits must be divisible by 16.
i.e 254,176: 176.
If the thousands digit is odd, the number formed by the last three digits plus 8 must be divisible by 16.
i.e 3408: 408 + 8 = 416.
i.e 254,176: 176.
If the thousands digit is odd, the number formed by the last three digits plus 8 must be divisible by 16.
i.e 3408: 408 + 8 = 416.
Nitesh vatsa said:
10 years ago
Lucky digit method.
Cancel multiple of 9 and add the rest.
3+2+1 = 6.
6+2+5 = 13 = 1+3 = 4.
6*4 = 24, 2+4 = 6.
Now check lucky digit method for option.
1. Cancel all combination of nine.
Add the rest 5+8 = 13 = 1+3 = 4.
So correct answer is B.
Cancel multiple of 9 and add the rest.
3+2+1 = 6.
6+2+5 = 13 = 1+3 = 4.
6*4 = 24, 2+4 = 6.
Now check lucky digit method for option.
1. Cancel all combination of nine.
Add the rest 5+8 = 13 = 1+3 = 4.
So correct answer is B.
Nandini said:
5 years ago
@All
(935421 x 625) = (935421 x 5^4)
Because 5 x 5 x 5 x 5 = 5 ^4 = 625.
= {935421 x (10 /2)4},
= {935421 x 100000 /16},
= {93542100000/16}.
Than only simple division on your method.
(935421 x 625) = (935421 x 5^4)
Because 5 x 5 x 5 x 5 = 5 ^4 = 625.
= {935421 x (10 /2)4},
= {935421 x 100000 /16},
= {93542100000/16}.
Than only simple division on your method.
(1)
Vignesh said:
1 decade ago
935421* (600+20+5).
935421*6 = 5612526 add two 0 in end 561252600. -----A.
935421*2 = 1870842 add one 0 in end 18708420. ------B.
935421*5 = 4677105. -----C.
A+B+C = 584638125.
935421*6 = 5612526 add two 0 in end 561252600. -----A.
935421*2 = 1870842 add one 0 in end 18708420. ------B.
935421*5 = 4677105. -----C.
A+B+C = 584638125.
(2)
Sipu said:
1 year ago
9 + 3 + 5 + 4 + 2 + 1 = 24.
625 = 6 + 2 + 5 = 13.
24 * 13 = 312 = 3 + 1 + 2 = 6.
Opt B = 5 + 8 + 4 + 6 + 3 + 8 +1 + 2 + 5 = 42 = 4 + 2 = 6.
Hence, Option B is the answer.
625 = 6 + 2 + 5 = 13.
24 * 13 = 312 = 3 + 1 + 2 = 6.
Opt B = 5 + 8 + 4 + 6 + 3 + 8 +1 + 2 + 5 = 42 = 4 + 2 = 6.
Hence, Option B is the answer.
(37)
Dr R Vasudevan said:
1 decade ago
625 - use familiar 6.25 %, which is 100/16 ( like 12.5 = 100/8)(3.125% = 100/32).
Rest is as given in the top "EXPLANATION" 935421*10000/16 = 584638125.
Rest is as given in the top "EXPLANATION" 935421*10000/16 = 584638125.
Malay biitm bbsr said:
1 decade ago
1st step: 935421*100 = 93542100.
2nd step: 93542100*6 = 5161252600.
3rd step: 93542100/4 = 23385525.
4th step: 561252600 + 23385525 = 584638125(Answer).
2nd step: 93542100*6 = 5161252600.
3rd step: 93542100/4 = 23385525.
4th step: 561252600 + 23385525 = 584638125(Answer).
Sidharthan m said:
7 years ago
Please help me to solve this problem.
The sum and product of two numbers are 13 and 40 respectively. The sum of their reciprocal is?
The sum and product of two numbers are 13 and 40 respectively. The sum of their reciprocal is?
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