Number System What least number shall be added to 4700 to make it a perfect square ? 71 81 61 91 71 81 61 91 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 4/6 of 6/5 of 5/7 of a number is 96. Find the number. 170 162 168 164 170 162 168 164 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.∴ x x 4/6 x 6/5 x 5/7 = 96∴ x = 96 x 6 x 5 x 7/4 x 6 x 5 = 168
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 21.84 24.84 25.84 27.84 21.84 24.84 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 1260 x 1.45 - 888 x 1.75 = ? 367 273 256 295 367 273 256 295 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273
Number System {(742)² ÷ 36} ÷ 2 = ? 420.5 423.5 422.5 421.5 420.5 423.5 422.5 421.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = (174 x 174/36) ÷ 2 = 841/2 = 420.5
Number System How many numbers up to 100 and 300 are divisible by 11? 21 22 18 20 21 22 18 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (300 – 100)/11 = 200/11 = 18 2/1118 Numbers
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