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 29 years 31 years 28 years 30 years 29 years 31 years 28 years 30 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 1256+4813+765=? 6831 6839 6836 6834 6831 6839 6836 6834 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1256+4813+765= 6069+765=6834
Number System What is the least number, which is perfect square but contains 2700 as its factor? 5400 10800 2700 1800 5400 10800 2700 1800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System Sum of two consecutive even terms lacks by 98 from their product. Find the sum of these number 24 32 None 18 24 32 None 18 ANSWER DOWNLOAD EXAMIANS APP
Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 21.84 25.84 24.84 27.84 21.84 25.84 24.84 27.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
Number System When 102 is reduced from a number, the number gets reduced by 88%. What is that number ? 750 850 550 650 750 850 550 650 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 850
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