Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 146 163 179 124 146 163 179 124 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 24 84 21 42 24 84 21 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System Sum of two numbers is 80. Greater number exceeds by 5 from four times of the smaller. Find the numbers? 60, 20 64, 16 62, 18 65, 15 60, 20 64, 16 62, 18 65, 15 ANSWER DOWNLOAD EXAMIANS APP
Number System If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers. 25 125 30 50 25 125 30 50 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System Three seventh of a number is 12 more than 40% of that number. What will be the 60% of that number? 248 210 148 126 248 210 148 126 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/7 x – 40/100 x = 12x = 35 * 1235 * 12 * 60/100 = 252/2 = 126
Number System 3251 + 587 + 369 - ? = 3007 1200 1300 1375 1250 1200 1300 1375 1250 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let 4207 - x = 3007 Then, x = 4207 - 3007 = 1200
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