Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 360 48 36 45 360 48 36 45 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of the ages of a son and father is 65 years. After 5 years the age of father will be double of the age of son. What is the age of son ? 20 years 19 years 17 years 18 years 20 years 19 years 17 years 18 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the age of the son be x and the age of the father be y.Therefore, x + y = 65 ..........(i)or, 2 x (x + 5) = (y + 5)or, 2x + 10 = y + 5or, 2x - y = 5 ...................(ii)From equations (i) and (ii), x = 20, y = 45
Number System If the sum of four consecutive numbers is 370, which the following is the third lowest number among them 90 92 91 89 90 92 91 89 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four consecutive numbers be x, (x + 1), (x + 2), (x + 3) thenx + (x + 1) + (x + 2) + (x + 3) = 370= 4x + 6 = 370∴ x = 364/4 = 91∴ third lowest number among them = x + 1= 91 + 1 = 92
Number System Two numbers have a H.C.F of 16 and a product of two numbers is 2560. Find the L.C.M of the two numbers? 140 150 160 170 140 150 160 170 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP L.C.M of two numbers is given by(Product of the two numbers) / (H.C.F of the two numbers) = 2560/16 = 160.
Number System The average of five consecutive even numbers A, B, C, D and E is 42. What is the product of B and D ? 2476 3289 4589 1760 2476 3289 4589 1760 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E/5 = 42∴ C = 42, ∴ B = 40, ∴ D = 44∴ B x D = 40 x 44 = 1760
Number System 7.98 x 3.75 + 1.28 x 15.5 = ? 47.765 48.765 46.765 49.765 47.765 48.765 46.765 49.765 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 29.925 + 19.84 = 49.765
EXAMIANS