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Number System

Number System
A number exceeds by 25 from its 3/8 part. Then the number is?

32
39
40
35

ANSWER DOWNLOAD EXAMIANS APP

Number System
Find out the smallest possible number which will be divisible by 1122 as well as 153.

4366
1366
2366
3366

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3366

Number System
√2304 x √? = 2832

3581
3381
3681
3481

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

√2304 x √? = 2832= 48 x √? = 2832= √? = 2832/48 = 59∴? = 59 x 59 = 3481

Number System
If the difference between the squares of two consecutive numbers is 47, what is the smaller number ?

26
25
23
24

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23

Number System
A basket contains 5 blue, 4 green and 3 red ball. If three balls are picked at random, what is the probability that at least one is red ?

37/52
32/51
34/55
31/58

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Probability of having no red ball is9C3 / 12C3 = 21/55Probability of having at least one red ball is 1 - 21/55 = 34/55

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

77
80
83
85

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

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