Number System (12.11)2 + (?)2 = 732.2921 17.2 20.2 24.2 14.2 17.2 20.2 24.2 14.2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 24.2
Number System In how many different ways can be the letters of the word PENCIL be arranged among themselves ? 640 510 860 720 640 510 860 720 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total six letters are there and hence the number of arrangements = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System The difference between a number and its three-fifth is 50. What is the number? 125 None of these 75 100 125 None of these 75 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1200 1082 1192 1092 1200 1082 1192 1092 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of the two numbers is 12 and their product is 35. What is the sum of the reciprocals of these numbers? 35/8 7/32 1/35 12/35 35/8 7/32 1/35 12/35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,a + b = 12 and ab = 35.(a + b)/ab = 12/35= (1/b + 1/a) = 12/35Sum of reciprocals of given numbers = 12/35.
Number System 5358 * 51 = ? 273258 273358 273268 273348 273258 273358 273268 273348 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5358 * 51 = 5358 * (50 + 1) = 5358 * 50 + 5358 * 1= 267900 + 5358 = 273258
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