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Number System

Number System
Three numbers which are co-prime to one another are such that the product of the first two 551 and that of the last two is 1073. The sum of the three numbers is

110
93
85
74

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

85

Number System
Find the least number with which 16200 should be multiplied, to make it a perfect cube.

48
360
45
36

ANSWER DOWNLOAD EXAMIANS APP

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 a + b = 16 and ab = 68, what is the value of a² + b² ?

116
120
124
112

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

a + b = 16 Therefore, (a+b)² = (16)² = 256                    a² + b² + 2ab = 256Therefore,        a² + b² = 256 - 2 x 68Therefore, a² + b² = 256 - 136 = 120

Number System
Look at this series: 1000, 200, 40, ... What number should come next?

8
2
14
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

This is a simple division series. Each number is divided by 5. Rule = (1st number / 5 = 2nd number) (2nd number / 5 = 3rd number)....Now, (1000 / 5 = 200), (200 / 5 = 40), (40 / 5 = 8)...So answer is a = 8.

Number System
The sum of two numbers is 25 and their difference is 13. Find their product.

114
315
325
104

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be x and y. Then x + y = 25 and x - y = 13.x = 19; y = 6xy = 19 * 6 = 114

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