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Number System

Number System
What is 432 times 119 ?

50408
53408
52408
51408

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

No. 432 x 119 = 51408

Number System
What is the least number that should be added to 5200 to make it a perfect square ?

275
288
129
225

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.

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

83
77
80
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

Number System
83250÷?=74×25

21
38
45
59

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

45

Number System
In each of the following numbers, what should be the missing digit in the indicated place such that the number is a multiple of 11?

3
8
5
2

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Divisibility of 11: If the difference of the sum of the digits at odd places and the sum of the digits at even places of a number is zero or a multiple of 11, then that number is divisible by 11.As per divisibility rule of 11, difference = (x + 21) - 18 = x + 3=> x + 3 = 11 => x = 8

Number System
20% of the total number of students in a school play football. How many students do not play football if the total number of students in the school is 7600 ?

5800
6000
6080
5976

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

20% of 7600 = 1520Therefore, students who do not play football = 7600 - 1520 = 6080

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