Number System Four-fifth of a number is 10 more than two-third of the same number. What is the number? 75 89 35 91 75 89 35 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System Two third of three- fifth of one fourth of a number is 24, what is 30% of that number? 42 90 69 72 42 90 69 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 2/3 * 3/5 * 1/4 = 24x = 240240 * 30/100 = 72
Number System The average of 7 numbers is 15, that of the first three is 6 and that of the last three is 23. What is the fourth number? 18 15 7 13 18 15 7 13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4th No. = (Total of 7 Nos) - (Total of first three + total of last 3) = (15 x 7) - (6 x 3 + 23 x 3) = 105 - (18 + 69) =105 - 87 = 18
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 7 3 5 11 7 3 5 11 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 (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = ? 28.56 29.81 30.52 27.54 28.56 29.81 30.52 27.54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (4.6 x 2.8 x 5.5) - (3.2 x 4.5 x 2.8) = 70.84 - 40.32 = 30.52
Number System In an examination, 68% of the total examinees passed. If the number of failures is 248, the total number of examinees is 725 750 640 775 725 750 640 775 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Failed students are 32% which is 248.∴ Total = 24800/32 = 775
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