Number System ?2704 x ?2209=? 3444 1444 4444 2444 3444 1444 4444 2444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2444
Number System The difference between a two-digit number and the number obtained by interchange the two digits of the number is 27. If the sum of the two digits of the number is 13, what is their product ? 38 40 39 37 38 40 39 37 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ 10x + y - (10y + x) = 27or 9x - 9y = 27∴ x - y = 3 .......(I)x + y = 13 .......(II)From eqn (I) and (II)x = 8 and y = 5.So the number = 85Therefore, product = 8 x 5 = 40
Number System The difference between 72% of a number and 49% of the same number is 575. What is 9% of that number ? 225 275 295 245 225 275 295 245 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x.Therefore, 72% of x - 49% of x = 575Therefore, (72 - 49)% of x = 575Therefore, 9% of x = 575/23 x 9 = 225
Number System What is the sum of 1 + 2 + 3+ ... + 27 ? 382 378 396 343 382 378 396 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Sum = 27 x (27 + 1)/2= 27 x 28/2= 27 x 14= 378
Number System 3√103820 x 3√274620 = ? 3035 3065 3045 3055 3035 3065 3045 3055 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3√103820 = 47 and 3√274620 = 65 ∴ ? = 47 x 65 = 3055
Number System Of the three numbers, second is twice the first and is also thrice the third. If the average of the three numbers is 44, the largest number is 56 44 72 38 56 44 72 38 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 72
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