Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 21 42 24 84 21 42 24 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 10 14 12 16 10 14 12 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 5 3 11 7 5 3 11 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/5 3/10 4/5 5/4 3/5 3/10 4/5 5/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System Find the nearest to 25268 which is exactly divisible by 467? 25228 25218 25308 25208 25228 25218 25308 25208 ANSWER DOWNLOAD EXAMIANS APP
Number System If three eighth of a number is 141. What will be the approximately value of 32.08% of this number? 60 120 90 160 60 120 90 160 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/8 = 141 => x= 376376 * 32.08/100 = 120
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