Number System (800 / 64) * (1296 / 36) = ? None of these 500 460 420 None of these 500 460 420 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given Exp.= 800/64 * 1296/36 = 12.5 * 36 = 450
Number System Sum of the digits number is 8 and their product is 12. Find the difference between the digits? 2 6 4 None 2 6 4 None ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 8xy = 12(x – y)2 = (x + y)2 – 4xy (x – y)2 = 64 – 48 => (x – y) = 4
Number System 75% of 250 - ?% of 380 = 54.5 39 35 31 33 39 35 31 33 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35
Number System What is the least number that should be added to 5200 to make it a perfect square ? 225 129 275 288 225 129 275 288 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP We sec (73)² = 5329 and (72)² = 5184ie 5329 > 5200 > 5184So 129 should be added to make is perfect square.
Number System Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is: 5 4 10 6 5 4 10 6 ANSWER DOWNLOAD EXAMIANS APP
Number System If 35% of a number is 899.5, what is 68% of that number ? 1747.6 2247.6 1547.6 1847.6 1747.6 2247.6 1547.6 1847.6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Suppose the number is x.Then 35% of x = 899.5∴ 68% of x = 68/35 x 899.5 = 1747.6
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