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Number System

Number System
Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number?

180
140
160
240

ANSWER DOWNLOAD EXAMIANS APP

Number System
3√68921 = ?

51
31
21
41

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 3√68921= 3√41 x 41 x 41= 41

Number System
The product of two consecutive odd numbers is 6723. Find is the greater number.

85
80
77
83

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the first odd number be x.Then, the other odd number would be x + 2.∴ x(x+2) = 6723= x2 + 2x = 6723= x2 + 2x = 6723= x2 + 2x - 6723 = 0= x2 + 83 - 81 x - 6723 = 0= x(x+83) - 81 (x + 83) = 0= (x + 83) (x - 81) = 0= (x + 83) (x - 81) = 0= x - 81 = 0∴ x = 81Hence, greater number = x + 2 = 81 + 2 = 83

Number System
1256+4813+765=?

6836
6839
6834
6831

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1256+4813+765= 6069+765=6834

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

1300
1240
1280
1260

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Number of ways = 7!/2!2! = 1260(∵ L and E come twice)

Number System
65% of 320+?=686

481
479
480
478

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

65% of 320+?=686 208+?=686?=686-208?=478

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