Number System What is the sum of all the composite numbers up to 20? 130 128 132 131 130 128 132 131 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 97 91 86 94 97 91 86 94 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System 7.8% of 12.5 + 2.5% of 161 = ? 2 12 9 5 2 12 9 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7.8 x 12.5/100 + 2.5 x 161/100= 0.975 + 4.025= 5
Number System How many numbers up to 300 and 700 are divisible by 2, 3 and 7 both together? 8 9 10 11 8 9 10 11 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (700 – 300)/42 = 9 22/42 => 9 Numbers
Number System What least number should be added to 8602 to make it a perfect square ? 47 36 41 51 47 36 41 51 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP So, (93)² = 8649So, the required number to be added to make a perfect square = 8649 - 8602 = 47
Number System 450% of a number is 4725. What is 82% of that number ? 851 841 861 871 851 841 861 871 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 450/100 = 4725= x = 4725 x 100/450 = 1050∴ 82% of 1050 = 1050 x 82/100= 861
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