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Number System

Number System
What is the difference between the largest number and the least number written with the digits 7, 3, 1, 4?

5084
6084
6048
6184

ANSWER DOWNLOAD EXAMIANS APP

Number System
In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is

640
750
725
775

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Failed students are 32% which is 248.∴ Total = 24800/32 = 775

Number System
What is the least number to be subtracted from 696 to make it a perfect square?

1
16
20
71

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

The numbers less than 696 and are squares of certain numbers are 676, 625.The least number that should be subtracted from 696 to make it perfect square = 696 - 676 = 20.

Number System
Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case.

386
388
384
391

ANSWER DOWNLOAD EXAMIANS APP

Number System
If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ?

780
720
660
840

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660

Number System
In how many different ways can the letters of word "SENTENCE" be arranged ?

6460
3360
2360
3260

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number of ways = 8!/3! 2! = 40320/12 = 3360

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