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? 12/35 1/35 35/8 7/32 12/35 1/35 35/8 7/32 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 36% of 850+? % of 592 = 750 12.5 50 25 75 12.5 50 25 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System What is the sum of all the composite numbers up to 20? 132 131 130 128 132 131 130 128 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4 + 6 + 8 + 9 + 10 + 12 + 14 + 15 + 16 + 18 = 132
Number System 148 x 3.75 x 4 = 111 x ? 17 24 19 20 17 24 19 20 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 148 x 3.75 x 4/111 = 20
Number System 1260 x 1.45 - 888 x 1.75 = ? 273 256 295 367 273 256 295 367 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP ? = 1260 x 1.45 - 888 x 1.75= 1827 - 1554 = 273
Number System The sum of two numbers is 165 and the difference between them is 9. What is the average of these two numbers ? 82.5 85.5 83.5 84.5 82.5 85.5 83.5 84.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x + y = 165x - y = 92x = 174 ∴ x = 87 and y = 78∴ x + y/2 = 165/2 = 82.5
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