Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 12 14 16 10 12 14 16 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System (444 x 44 x 4) ÷ 40 ? 2153.6 1853.6 2053.6 1953.6 2153.6 1853.6 2053.6 1953.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 444 x 44 x 4/40 = 1953.6
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 65 35 55 45 65 35 55 45 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System The simplest form of 1.5 : 2.5 is : 5 : 7 17 : 19 13 : 11 3 : 5 5 : 7 17 : 19 13 : 11 3 : 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3 : 5
Number System What least number shall be added to 4700 to make it a perfect square ? 91 81 71 61 91 81 71 61 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.
Number System 65 x 288 ÷ 52 = 1.8 x ? 190 180 200 210 190 180 200 210 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 65x288/52x1.8 = 200
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