Number System How many figures are required to number the pages the pages of a book containing 365 pages? 977 987 967 897 977 987 967 897 ANSWER DOWNLOAD EXAMIANS APP
Number System If the difference between a number and two-fifths of that number is 45 what is the number ? 76 77 75 78 76 77 75 78 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x ∴ x - 2x/5 = 45∴ x = 75
Number System The sum of the two numbers is 12 and their product is 35. What is the sum of the reciprocals of these numbers? 35/8 7/32 12/35 1/35 35/8 7/32 12/35 1/35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,a + b = 12 and ab = 35.(a + b)/ab = 12/35= (1/b + 1/a) = 12/35Sum of reciprocals of given numbers = 12/35.
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. 91 97 94 86 91 97 94 86 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 42 24 18 81 42 24 18 81 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System 56.21 +2.36+5.41 —21.4+1.5=? 64.08 54.08 44.08 34.08 64.08 54.08 44.08 34.08 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 44.08
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