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Number System

Number System
What is 432 times 119 ?

52408
50408
53408
51408

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

No. 432 x 119 = 51408

Number System
8988 / 8 / 4 = ?

280.875
2247
561.75
4494

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8988 * 1/8 * 1/4 = 2247/8 = 280.875

Number System
Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is

8.484
8.584
8.784
8.684

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

8.484

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

116
112
124
120

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
When 732 is subtracted form the square of a number, the answer that is obtained is 5280. What is the number?

103
101
97
99

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

x2 - 732 = 5280 x2 = 5280 + (70+3)2 = 5280 + 4900 + 420 + 9 = 10609= 10000 + 2(100)(3) + 32 = (100 + 3)2x = 100 + 3 = 103.

Number System
Find the greatest four digit number which leaves respective remainders of 2 and 5 when divided by 15 and 24.

None of these
9565
9974
9125

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Since the difference between the divisors and the respective remainders is not constant, back substitution is the convenient method. None of the given numbers is satisfying the condition.

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