Number System The average of 7 consecutive even numbers A, B, C, D, E, F and G is 36. What is the product of ' C and 'E' ? 1292 1327 1168 1468 1292 1327 1168 1468 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A + B + C + D + E + F + G/7 = 36Therefore, D = 36Therefore, C = 34, E = 38Therefore, Product = 34 x 38 = 1292
Number System How many figures are required to number the pages the pages of a book containing 365 pages? 967 987 977 897 967 987 977 897 ANSWER DOWNLOAD EXAMIANS APP
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. 800 Rs. 810 Rs. 820 Rs. 830 Rs. 800 Rs. 810 Rs. 820 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 What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 6093 6993 693 6893 6093 6993 693 6893 ANSWER DOWNLOAD EXAMIANS APP
Number System What is the least number, which is perfect square but contains 2700 as its factor? 5400 10800 1800 2700 5400 10800 1800 2700 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 900 * 3 * 3 = 8100
Number System If (74)² is added to the square of a number the answer so obtained is 7780. What is the number ? 50 49 47 48 50 49 47 48 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.or, x² + (74)² = 7780or, x² = 7780 - 5476 = 2304∴ x = 48
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