Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 55 45 65 35 55 45 65 35 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 20% of the total number of students in a school play football. How many students do not play football if the total number of students in the school is 7600 ? 6080 6000 5976 5800 6080 6000 5976 5800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 20% of 7600 = 1520Therefore, students who do not play football = 7600 - 1520 = 6080
Number System What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 6893 693 6093 6993 6893 693 6093 6993 ANSWER DOWNLOAD EXAMIANS APP
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 10 5 6 4 10 5 6 4 ANSWER DOWNLOAD EXAMIANS APP
Number System Pick the wrong number from the given number series. 3,4,10,33,135,685,4116 135 33 685 10 135 33 685 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The correct number is 136.3 x 1 + 1 = 44 x 2 + 2 = 1010 x 3 + 3 = 3333 x 4 + 4 = 136136 x 5 + 5 = 685685 x 6 + 6 = 4116
Number System If a number is multiplied by. three-fourth of itself, the value thus obtained is 10800. What is that number ? 60 180 260 120 60 180 260 120 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 3x/4 = 10800= x² = 10800 x 4/3 = 14400∴ x = √14400 = 120
EXAMIANS