Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 42 23 36 16 42 23 36 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System A number is doubled and 9 is added. If the resultant is trebled, it becomes 75. What is that number? 6 3.5 8 None of these 6 3.5 8 None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,3(2x + 9) = 752x = 16 => x = 8
Number System If (182)² is added to the square of a number, the answer so obtained is 47765. What is the number ? 111 131 121 101 111 131 121 101 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be xTherefore x² + (182)² = 47765Therefore x² = 47765 - (182)2 = 47765 - 33124Therefore x² = 14641, Therefore x = 121
Number System A bag contains four red, six black and seven green balls. Three balls are drawn randomly. What is the probability that the balls drawn contain exactly two red balls ? 58/340 45/340 51/340 39/340 58/340 45/340 51/340 39/340 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Total balls = 4 + 6 + 7 = 17∴ n(S) = 17C1 = 680Two red balls can be selected from four red balls in 4C2 = 6 ways.and the third ball can be selected from the remaining 13 balls in 13C1 = 13 ways.∴ P (E) = 13x6/680 = 39/340
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: 5336 9865 6890 2568 5336 9865 6890 2568 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 5336
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 168 169 171 170 168 169 171 170 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
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