Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 3.5 6 None of these 8 3.5 6 None of these 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System 9 3/4 + 7 2/17 - 9 1/15 = ? 9 817/1020 7 817/1020 9 719/1020 7 719/1020 9 817/1020 7 817/1020 9 719/1020 7 719/1020 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given sum = 9 + 3/4 + 7 + 2/17 - (9 + 1/15)= (9 + 7 - 9) + (3/4 + 2/17 - 1/15)= 7 + (765 + 120 - 68)/1020 = 7 817/1020
Number System What is the sum of all the prime numbers from 20 to 40? 120 118 119 117 120 118 119 117 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
Number System Find the smallest number which when divided by 13 and 16 leaves respective remainders of 2 and 5. 187 207 219 197 187 207 219 197 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 'N' is the smallest number which divided by 13 and 16 leaves respective remainders of 2 and 5.Required number = (LCM of 13 and 16) - (common difference of divisors and remainders) = (208) - (11) = 197.
Number System A man engaged a servant on the condition that he would pay him Rs.900 and a uniform after one year service. He served only for 9 months and received uniform and Rs.650, find the price of the uniform? Rs.100 Rs.90 Rs.80 Rs.85 Rs.100 Rs.90 Rs.80 Rs.85 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9/12 = 3/4 * 900 = 675 650 ------------- 251/4 -------- 251 --------- ? => Rs.100
Number System Which one of the following represents the sum of the first n even numbers? N2+ 1 N(N – 1) N2 N(N + 1) N2+ 1 N(N – 1) N2 N(N + 1) ANSWER EXPLANATION DOWNLOAD EXAMIANS APP N (N + 1)
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