Number System Ratio between two numbers is 3: 4 and their sum is 420. Find the smaller number? 140 240 180 160 140 240 180 160 ANSWER DOWNLOAD EXAMIANS APP
Number System The sum of four consecutive even numbers is 36. Find the sum of the squares of these numbers? 296 344 388 252 296 344 388 252 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four numbers be x, x + 2, x + 4 and x + 6.=> x + x + 2 + x + 4 + x + 6 = 36=> 4x + 12 = 36 => x = 6The numbers are 6, 8, 10 and 12.Sum of their squares = 62 + 82 + 102 + 122 = 36 + 64 + 100 + 144 = 344.
Number System If the difference between a number and its 2/5 is 240, find the number. 360 440 400 480 360 440 400 480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore x - 2x/5 = 240, Therefore, 3x/5 = 240Therefore, x = 240x5/3 = 400
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 6489 2883 3892 2893 6489 2883 3892 2893 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 225 295 275 245 225 295 275 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System The sum of three consecutive multiples of 3 is 72. What is the largest number? 36 24 21 27 36 24 21 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
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