Number System What is the value of ? in the following equations ? 72/? = ?/50 40 60 80 100 40 60 80 100 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (?)² = 72 x 50= (6 x 6 x 2) x (5 x 5 x 2)= (6 x 5 x 2)² = (60)²∴ ? = 60
Number System What is 50% of 40% of Rs. 3,450? 670 630 690 640 670 630 690 640 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 40% * 3450 = 1380then, 50 % * 1380 = 690
Number System What is 846 times 323 ? 273258 264258 293798 283298 273258 264258 293798 283298 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 846 x 323 = 273258
Number System What is the difference between the largest and the smallest number written with 7, 7, 0, 7? 6993 6893 6093 693 6993 6893 6093 693 ANSWER DOWNLOAD EXAMIANS APP
Number System In how many different ways can the letters of the word 'FRUGAL'be arranged ? 515 660 720 556 515 660 720 556 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 If the sum of the two numbers is 22 and the sum of their squares is 404, then the product of the numbers is: 88 80 44 40 88 80 44 40 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then, (x + y) = 22 and x2 + y2 = 404 Now, 2xy = (x + y)2 - (x2 + y2) 2xy= 222 - 404 = 484 - 404 = 80xy = 40
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