Number System What is the sum of all the composite numbers up to 20? 128 130 132 131 128 130 132 131 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System Three numbers are in ratio of 3: 4 :5. If the sum of first & third numbers is more than second number by 52, which will be largest number? 78 34 65 23 78 34 65 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 65
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 ? 40 37 39 38 40 37 39 38 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 How many numbers up to 200 are divisible by 2 and 3 both? 29 33 35 27 29 33 35 27 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 200/6 = 33 2/6 => 33 Numbers
Number System If the fractions8/5,7/2,9/5,5/4,4/5 are arranged in descending order of their values, which one will be fourth? 7/9 1/3 5/4 11/13 7/9 1/3 5/4 11/13 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5/4
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 30 20 15 18 30 20 15 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
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