Number System The sum of two numbers is 25 and their difference is 13. Find their product. 104 114 315 325 104 114 315 325 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then x + y = 25 and x - y = 13.x = 19; y = 6xy = 19 * 6 = 114
Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 515 720 660 556 515 720 660 556 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In FRUGAL there ae six difference letters Therefore, 6 ! = 6 x 5 x 4 x 3 x 2 x 1 = 720
Number System (3² x 4² x 5) ÷ 36 = (?)² - 80 16 14 12 10 16 14 12 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 3² x 4² x 5/36 + 80= 20 + 80 = 100∴ ? = √100 = 10
Number System In how many different ways can the letters of the word "MOBILIZE" be arranged ? 20160 17453 18456 19765 20160 17453 18456 19765 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word MOBILIZE has eight letters in which I comes twice ∴ Number of arrangements = 8!/2! = 20160
Number System What is the sum of all the composite numbers up to 20? 131 130 132 128 131 130 132 128 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System What should come in the place of question mark (?) in the number series given below? 160 158 157 159 160 158 157 159 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 160
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