Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 23 25 24 26 23 25 24 26 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System What value should come in place of ? in the given number series ? 15, 51, 162, 498, 1509, ? 3434 5656 4545 7878 3434 5656 4545 7878 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 15, (15 + 2) x 3 = 51,(51 + 3) x 3 = 162, (162 + 4) x 3 = 498, (498 + 5) x 3 = 1509(1509 + 6) x 3 = 4545
Number System Find the average of the following set of scores 450, 1050, 12, 390, 143, 286, 550, 999 480 485 490 495 480 485 490 495 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Required average score = (450 + 1050 + 12 + 390 + 143 + 286 + 550 + 999) / 8 = 3880 / 8 = 485
Number System 384×12×2=? 6123 7487 8465 9216 6123 7487 8465 9216 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 9216
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 What is the sum of all the prime numbers from 20 to 40? 120 117 118 119 120 117 118 119 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 23 + 29 + 31 + 37 = 120
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