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Number System

Number System
What is the difference between the local values of 3 in the number 53403?

3030
2997
0
3003

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3000 – 3 = 2997

Number System
The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ?

25 years
21 years
15 years
18 years

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the father's age be x and son's age yTherefore, x + y = 60   ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15

Number System
What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345?

5243
2345
2105
2435

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

2000 + 300 + 40 + 5 = 2345

Number System
2536+4851—?=3450+313

6784
4567
3624
5243

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3624

Number System
5358 * 51 = ?

273348
273268
273258
273358

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258

Number System
The number of prime factors of (6)10×(7)17×(55)27

41
61
101
91

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

91

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