Number System Two-third of a positive number and 25/216 of its reciprocal are equal. The number is: 12/5 144/25 5/12 25/144 12/5 144/25 5/12 25/144 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,2/3 x = 25/216 * 1/xx2 = 25/216 * 3/2 = 25/144 x = 5/12
Number System Supply the missing figure : 2, 6, 12, 20, 30 ... 56 40 39 41 42 40 39 41 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 42
Number System If the L.C.M of two numbers is 750 and their product is 18750, find the H.C.F of the numbers. 50 125 30 25 50 125 30 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System If the difference between a number and its three-fourth is 18, find the number. 61 57 68 72 61 57 68 72 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x.According to the question,x - 3x/4 = 18= x/4 = 18= x = 4 x 18 = 72
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
Number System The cost of 87 pens and 29 pencils is `783. What is the cost of 90 pens and 30 pencils ? Rs. 830 Rs. 800 Rs. 810 Rs. 820 Rs. 830 Rs. 800 Rs. 810 Rs. 820 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the price of a pen be 'x' and that of pencil be 'y' Then 87x + 29y = 783Multiplying eqn (i) by 30/29 we get (87x) x 30/29 + (29y) 30/29 = 783 x 30/29∴ 90x + 30y = 810
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