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Number System

Number System
√9216 + √15376 = ?

220
227
224
231

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

? = √9216 + √15376= 96 + 124= 220

Number System
What should come in place of question mark (?) in the following number series ? 7, 176, 480, 1058, 2188, 4426, ?

8882
8888
8881
8884

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Series is (No. + 9²) x 2, (+8²) x 2, (+7²) x 2, (+6²) x 2.......

Number System
What is 846 times 323 ?

264258
273258
283298
293798

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

846 x 323 = 273258

Number System
What is the sum of 1 + 2 + 3+ ... + 27 ?

396
343
378
382

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378

Number System
If x + y = 61 and xy = 888, What is the value of x²+ y² ?

1975
1955
1965
1945

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Because (x + y)²  = x² + y² + 2xy∴ x² + y² = (x + y)² - 2xy∴ x² + y² = (61)² - 2 x 888= 3721 - 1776 = 1945

Number System
56.21 +2.36+5.41 —21.4+1.5=?

64.08
44.08
34.08
54.08

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

44.08

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