Number System Find the number of factors of 300 excluding 1 and itself. 16 15 14 18 16 15 14 18 ANSWER DOWNLOAD EXAMIANS APP
Number System Which choice provides the answer in the following : If 2 * 3 = 36, 5 * 4 = 400, 6 * 2 = 144, 3 * 3 = 81; then, 5 * 5 = ? 425 625 325 525 425 625 325 525 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 625
Number System What number should come in the place of (?) in the following number series ? 1, 4, 9, 25, 49, ?, 169, 289, 361 11 121 225 321 11 121 225 321 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The series is (Prime No.)²So it is (11)² = 121
Number System In how many different ways can the letters of the word CORPORATION be arranged ? 3326400 1326400 2326400 None of these 3326400 1326400 2326400 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP CORPORATION = 11 letters 'O' comes thrice,'R' twice.∴ total no. of ways = 111/3121 = 3326400
Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 84.5 83.5 85.5 82.5 84.5 83.5 85.5 82.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 146 179 124 163 146 179 124 163 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
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