Number System The average of five consecutive even numbers A, B, C, D and E is 54. What is the product of'B' and 'E' ? 2871 1456 3016 4098 2871 1456 3016 4098 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Because, The even numbers are consecutive and their average is 54.∴ The number C will be 54.∴ A = 50, B = 52, D = 56, E = 58B x E = 52 x 58 = 3016
Number System The difference between 78% of a number and 59% of the same number is 323. What is 62% of that number ? Rs. 986 Rs. 945 Rs. 1054 Rs. 926 Rs. 986 Rs. 945 Rs. 1054 Rs. 926 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.78% of x - 59% of x = 323= 78x - 59x/100 = 323= 19x/100 = 323∴ x = 323 x 100/19 = 1700= 62% of 1700 = 1700 x 62/100 = 1054
Number System How many figures are required for numbering the pages of a book containing 1000 pages? 2893 6489 2883 3892 2893 6489 2883 3892 ANSWER DOWNLOAD EXAMIANS APP
Number System If the of a two-digit number are interchanged, the number so obtained is greater than the original number by 18. If the sum of the two digits of the number is 14. What is the original number ? 68 64 66 62 68 64 66 62 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be 10x + y.No. formed by the interchange of digits = 10y + xWe have y - x = 2 .........(i)y + x = 14 .........(ii)Solving (i) and (ii), we get x = 6, and y = 8∴ the no. is 68.
Number System When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ? 45 55 35 65 45 55 35 65 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x² - (21)² = 1584= x² - 441 = 1584 = x² = 1584 + 441 = 2025∴ x = √2025 = 45
Number System 7432 ÷ 32 x ? = 2787 12 21 41 78 12 21 41 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7432/32 x ? = 2787= ? = 2787 x 32/7432 = 12
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