Number System In how many different ways can the letters of word "SENTENCE" be arranged ? 2360 6460 3360 3260 2360 6460 3360 3260 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number of ways = 8!/3! 2! = 40320/12 = 3360
Number System The sum of the present age of a father and a son is 60 years. Five years before, the age of the father was four times that of son. What is the present age of the son ? 15 years 21 years 25 years 18 years 15 years 21 years 25 years 18 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the father's age be x and son's age yTherefore, x + y = 60 ....................(i)Five years back, (x - 5) = 4 (y - 5)x - 4y = - 15 ......................(2)Solving (1) and (2), x = 45 and y = 15
Number System The sum of the two digits of a two-digit number is 15 and the difference between the two digits of the two digit number is 3. What is the product of the two digits of the two digit number ? 54 None of these 36 14 54 None of these 36 14 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10 x + yWhere x > yAccording to the question,x + y = 15 and x - y = 3Solving both the equations,x = 9, y = 6∴ x x y = 9 x 6 = 54
Number System Complete the series : 1, 8, 27, 64, 125, 216 ..... 363 373 343 353 363 373 343 353 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 343
Number System The square root of 3 + “5 is : “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 + 1/”2 “3 /2 - 1/”2 “5 /2 - 1/”2 “(5/2) + “(1/2) “3 /2 + 1/”2 “3 /2 - 1/”2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP “(5/2) + “(1/2)
Number System What should come in place of the question mark (?) in the following number series ? 888 888 444 148 ? 7.4 37 35 33 29 37 35 33 29 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 888 ÷ 1 = 888888 ÷ 2 = 444444 ÷ 3 = 148148 ÷ 4 = 3737 ÷ 5 = 7.4
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