Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 4 6 None 2 4 6 None ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System How many figures are required to number the pages the pages of a book containing 365 pages? 987 897 977 967 987 897 977 967 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of the word TEST' be arranged ? 8 10 12 16 8 10 12 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System Find the number of factors of 300 excluding 1 and itself. 15 14 16 18 15 14 16 18 ANSWER DOWNLOAD EXAMIANS APP
Number System 74698 + 365 + 85213 + 95 = ? 160361 160351 160371 160341 160361 160351 160371 160341 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 74698 + 365 + 85213 + 95 = 160371
Number System The sum and the product of two numbers are 25 and 144 respectively, the difference of the number is? 3 11 7 5 3 11 7 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 25xy = 144(x- y)2 = (x + y)2 – 4xy(x- y)2 = 625 – 576 => (x – y) = 7
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