Number System The difference between 8% of a number and 3% of the same number is 39. What is 2.8% of that number ? 25.84 27.84 24.84 21.84 25.84 27.84 24.84 21.84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x(8 - 3)% = 39x = 3900/5 = 780∴ 2.8% of 780= 780 x 2.8/100 = 21.84
Number System What least number shall be added to 4700 to make it a perfect square ? 81 61 91 71 81 61 91 71 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.
Number System What is the sum of the local values of the digits 2, 3, 4, 5 in the number 2345? 2105 2345 2435 5243 2105 2345 2435 5243 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2000 + 300 + 40 + 5 = 2345
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 11 8 10 9 11 8 10 9 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System Let R = qs—4. When s=8, R=16. When s=10, R is equal to 23 22 20 21 23 22 20 21 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 21
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