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Number System

Number System
{(742)² ÷ 36} ÷ 2 = ?

421.5
420.5
422.5
423.5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = (174 x 174/36) ÷ 2 = 841/2 = 420.5

Number System
2536+4851—?=3450+313

3624
5243
6784
4567

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3624

Number System
Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is

44
72
38
56

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

72

Number System
If A + B = 30 and AB = 94, What is the value of A² + B² ?

920
625
824
712

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(A + B)² = (30)² = 900A² + B² + 2AB = 900Therefore, A² + B² = 900 - 2 x 94                                = 900 - 188 = 712

Number System
A man engaged a servant on the condition that he would pay him Rs.710 and a uniform after a year service. He served only for 8 months and got Rs.460 and a uniform. Find the price of the uniform?

Rs.25
Rs.30
Rs.20
Rs.40

ANSWER DOWNLOAD EXAMIANS APP

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

85
77
80
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

MORE MCQ ON Number System

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