Number System The sum of the two numbers is 12 and their product is 35. What is the sum of the reciprocals of these numbers? 35/8 7/32 12/35 1/35 35/8 7/32 12/35 1/35 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,a + b = 12 and ab = 35.(a + b)/ab = 12/35= (1/b + 1/a) = 12/35Sum of reciprocals of given numbers = 12/35.
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 3/5 3/10 4/5 5/4 3/5 3/10 4/5 5/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System 4550 ÷ 25% of ? = 130 130 135 140 125 130 135 140 125 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4550 ÷ ? x 25/100 = 130= 4550 ÷ ?/4 = 130= 4550 x 4/? = 130= ? x 130 = 4550 x 4= ? = 4550 x 4/130 = 140
Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 353 373 343 363 353 373 343 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System A number when, 28 subtracted from it reduces to its one third. What is the value of 50% of that number? 24 21 42 84 24 21 42 84 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2/3 x = 28 => x = 4242 * 1/2 = 21
Number System In a division sum, the divisor is 10 times the quotient and 5 times the remainder. If the remainder is 46, the dividend is: 2568 9865 5336 6890 2568 9865 5336 6890 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5336
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