Number System The average age of seven boys sitting in a row facing North is 26 years. If the average age of first three boys is 19 years and the average age of last three boys is 32 years, what is the age of the b 30 years 29 years 31 years 28 years 30 years 29 years 31 years 28 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Age of the fourth boy = (26 x 7 - 3 x 19 - 3 x 32) years = (182 - 57 - 96) years = 29 years
Number System The simplest form of 1.5 : 2.5 is : 13 : 11 3 : 5 5 : 7 17 : 19 13 : 11 3 : 5 5 : 7 17 : 19 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3 : 5
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 94 91 86 97 94 91 86 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System ind the number, difference between number and its 3/5 is 50 124 120 123 125 124 120 123 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number = x,Then, x-(3/5)x = 50,=> (2/5)x = 50 => 2x = 50*5,=> x = 125
Number System If (83)² is subtracted from the square of a number, the answer so obtained is 8487. What is the number ? 163 179 124 146 163 179 124 146 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x Therefore, x² - (83)² = 8487x² = 8487 + (83)²x² = 8487 + 6889x² = 15376Therefore, x² = 15376 x = 124
Number System Find the least number with which 16200 should be multiplied, to make it a perfect cube. 360 48 36 45 360 48 36 45 ANSWER DOWNLOAD EXAMIANS APP
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