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Number System

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

1260
1240
1280
1300

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

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

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

80
77
85
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
What will be the next number in the following number series ?

191
182
162
177

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

1² + 1, 3² + 3, 5² + 5, 7² + 7

Number System
If one-seventh of a number is 55 then 40% of that number = ?

147
163
154
171

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the no. be x ,             Therefore, x/7 = 55Therefore, x = 55 x 7 = 385Therefore, 49% of 385 = 154

Number System
83250÷?=74×25

38
45
59
21

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

45

Number System
(164 x 175) x ? = 258300

11
9
5
2

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = 258300 / 164 x 175 = 9

MORE MCQ ON Number System

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