Number System If R2 = S3 = K, where R, S and K are integers. Find the smallest positive integral value of K. (Greater than 1) 88 54 75 64 88 54 75 64 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 64
Number System What least number shall be added to 4700 to make it a perfect square ? 81 71 61 91 81 71 61 91 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (69)² = 4761 and (68)² = 4624Clerly 4624 < 4700 < 4761So 61 should be added to make 4700 a perfect square.
Number System 35%of ?=242 487 394 542 693 487 394 542 693 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 693
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
Number System A number consists of two digits. If 3/5 of 1/5 of the number is 9. Find the sum of its two digits? 60 7 12 8 60 7 12 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP x * 3/5 * 1/5 = 9x = 75 => 7 + 5 = 12
Number System 75% of 250 - ?% of 380 = 54.5 31 39 35 33 31 39 35 33 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 250 x 75/100 - 380 x ?/100 = 54.5= 250 x 75 - 380 x ?= 54.5 x 100= 18750 - 380 x ?= 5450= 380 x? = 18750 - 5450= 13300= ? = 13300/380 = 35
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