Number System The cost of 87 pens and 29 pencils is `783. What is the cost of 90 pens and 30 pencils ? Rs. 830 Rs. 820 Rs. 810 Rs. 800 Rs. 830 Rs. 820 Rs. 810 Rs. 800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the price of a pen be 'x' and that of pencil be 'y' Then 87x + 29y = 783Multiplying eqn (i) by 30/29 we get (87x) x 30/29 + (29y) 30/29 = 783 x 30/29∴ 90x + 30y = 810
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 40 32 39 35 40 32 39 35 ANSWER DOWNLOAD EXAMIANS APP
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. 86 91 94 97 86 91 94 97 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 44 46 45 47 44 46 45 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System (800 / 64) * (1296 / 36) = ? 500 420 None of these 460 500 420 None of these 460 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given Exp.= 800/64 * 1296/36 = 12.5 * 36 = 450
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 31 years 30 years 29 years 28 years 31 years 30 years 29 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
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