Number System 6.4 x 8.5 x 25/3.2 x 12.5 = ? 3.4 5.6 4.5 2.3 3.4 5.6 4.5 2.3 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 6.4 x 8.5 x 2.5/3.2 x 12.5 = 3.4
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 179 146 163 124 179 146 163 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System 1051.64 - 159.42 - 96.84 + 162.37 - 940.26 + 504 = ? 491.49 521.49 511.49 501.49 491.49 521.49 511.49 501.49 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1718.01 - 1196.52 = 521.49
Number System Which one of the following represents the sum of the first n even numbers? N(N + 1) N2 N2+ 1 N(N – 1) N(N + 1) N2 N2+ 1 N(N – 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 11 121 321 225 11 121 321 225 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
Number System 4/6 of 6/5 of 5/7 of a number is 96. Find the number. 170 164 168 162 170 164 168 162 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 4/6 x 6/5 x 5/7 = 96∴ x = 96 x 6 x 5 x 7/4 x 6 x 5 = 168
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