Number System The sum of two numbers is 25 and their difference is 13. Find their product. 315 104 114 325 315 104 114 325 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be x and y. Then x + y = 25 and x - y = 13.x = 19; y = 6xy = 19 * 6 = 114
Number System In how many different ways can the letters of the word TEST' be arranged ? 8 12 16 10 8 12 16 10 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System 50% of 8/15 of 9/4 of 5/3 of 333 = ? 333 444 666 555 333 444 666 555 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 50% of [8x9x5/15x4x3 x 333]= 50% of 666= 333
Number System What is the difference between the local value of 7 and 5 in the number 2574? 430 413 403 570 430 413 403 570 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 500 – 70 = 430
Number System If the numberator of a fraction is increased by 50% and denominator by 20% the fraction become 9/15. What was the original fraction ? 3/5 6/7 13/25 12/25 3/5 6/7 13/25 12/25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the fraction be x/yWe have 150x/120y = 9/15= x/y = 12/25
Number System The sum of the ages of a son and father is 65 years. After 5 years the age of father will be double of the age of son. What is the age of son ? 20 years 17 years 18 years 19 years 20 years 17 years 18 years 19 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the age of the son be x and the age of the father be y.Therefore, x + y = 65 ..........(i)or, 2 x (x + 5) = (y + 5)or, 2x + 10 = y + 5or, 2x - y = 5 ...................(ii)From equations (i) and (ii), x = 20, y = 45
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