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. 30 125 50 25 30 125 50 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP H.C.F = (Product of the numbers) / (Their L.C.M) = 18750/750 = 25.
Number System 1260 x 1.45 - 888 x 1.75 = ? 367 256 295 273 367 256 295 273 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273
Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 289/290 1/289 289 290/289 289/290 1/289 289 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System 63.602 + 153.756 + 94.754 - 84.321 - 122.204 = ? 140.587 142.587 141.587 143.587 140.587 142.587 141.587 143.587 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 312.112 - 170.525 = 141.587
Number System The cost of 87 pens and 29 pencils is `783. What is the cost of 90 pens and 30 pencils ? Rs. 820 Rs. 810 Rs. 830 Rs. 800 Rs. 820 Rs. 810 Rs. 830 Rs. 800 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
Number System 35%of ?=242 487 693 394 542 487 693 394 542 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 693
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