Number System How many numbers up to 100 and 300 are divisible by 11? 21 18 20 22 21 18 20 22 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
Number System The difference between a two-digit number and the number obtained by interchange the two digits of the number is 27. If the sum of the two digits of the number is 13, what is their product ? 40 39 38 37 40 39 38 37 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ 10x + y - (10y + x) = 27or 9x - 9y = 27∴ x - y = 3 .......(I)x + y = 13 .......(II)From eqn (I) and (II)x = 8 and y = 5.So the number = 85Therefore, product = 8 x 5 = 40
Number System Given √2 = 1.414, the value of √8 + 2√32 - 3√128 + 4√50 is 8.684 8.584 8.784 8.484 8.684 8.584 8.784 8.484 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 8.484
Number System (12)² - (4.4)² - (0.04)² = ? 124.6384 129.6384 131.6384 125.6384 124.6384 129.6384 131.6384 125.6384 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (12)² - (4.4)² - (0.04)²= 144 - 19.36 - 0.0016= 124.64 - 0.0016= 124.6384
Number System In how many different ways can the letters of word "COLLEGE" be arranged ? 1280 1260 1300 1240 1280 1260 1300 1240 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 7!/2!2! = 1260(∵ L and E come twice)
Number System If (35)² is added to the square of a number the answer so obtained is 1394. What is the number ? 11 15 13 17 11 15 13 17 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² + (35)² = 1394Therefore, x² = 1394 - (35)² = 1394 - 1225 = 169Therefore, x = √169 = 13
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