Number System How many times the keys of a typewriter have to be pressed in order to write first 400 counting numbers? 1192 1092 1082 1200 1192 1092 1082 1200 ANSWER DOWNLOAD EXAMIANS APP
Number System If the sum of 4 consecutive odd numbers is 104, what will be the third number if they are arranged in ascending order ? 28 29 27 30 28 29 27 30 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive odd number be x, x + 2, x + 4 and x + 6 respectively.According to the question x + x + 2 + x + 4 + x + 6 = 104 = 4x + 12 = 104 = 4x = 104 - 12 = 92∴ x = 92/4 = 23∴ Required number = x + 4= 23 + 4 = 27
Number System The difference between 45% of a number and 18% of the same number is 145.8. What is 30% of that number ? 188 162 141 245 188 162 141 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.45% of x - 18% of x = 145.8∴ x/100 (45 - 18) = 145.8∴ x = 145.8 x 100/27 = 540∴ 30% of 540 = 540 x 30/100 = 162
Number System 4.78% of 1255 + 3.24% of 440=0.5% of ? 11849 12849 13849 14849 11849 12849 13849 14849 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 0.5 x ?/100 = 4.78 x 1255/100 + 3.24 x 440/100= 59.989 + 14.256∴ ? = 74.245 x 100/0.5 = 14849
Number System The difference between a number and its three-fifth is 50. What is the number? None of these 125 75 100 None of these 125 75 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x - 3/5 x = 50 => 2/5 x = 50x = (50 * 5)/2 = 125.
Number System Find the number which multiplied by 15 is increased by 196. 28 20 26 14 28 20 26 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,15x - x = 196x = 14
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