Number System Find the greatest number which leaves the same remainder when it divides 25, 57 and 105. 8 16 12 18 8 16 12 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 105 - 57 = 4857 - 25 = 32105 - 25 = 80The H.C.F of 32, 48 and 80 is 16.
Number System Radha's present age is three years less than twice her age 12 years ago. Also the respective ratio between Raj's present age and Radha's present age is 4 : 9. What will be Raj's age after 5 years ? 16 years 17 years 15 years 14 years 16 years 17 years 15 years 14 years ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let Radha's present age = x years.∴ x = 2 (x = 12) - 3= x = 2x - 24 - 3= x = 27∴ Raja's present age = 4/9 x 27= 12 years ∴ Raja's age after 5 years = 12 + 5 = 17 years
Number System A two-digit number is such that the product of the digits is 8. When 18 is added to the number, then the digits are reversed. The number is: 24 81 18 42 24 81 18 42 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the ten's and unit's digit be x and 8/x respectively. Then, (10x + 8/x) + 18 = 10 * 8/x + x 9x2 + 18x - 72 = 0 x2 + 2x - 8 = 0 (x + 4)(x - 2) = 0 x = 2 So, ten's digit = 2 and unit's digit = 4. Hence, required number = 24.
Number System Find the least value of 3x + 4y if x2y3 = 6. 10 3 6 7 10 3 6 7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 10
Number System What should come in the place of question mark (?) in the number series given below? 160 159 158 157 160 159 158 157 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 160
Number System 4500 * ? = 3375 2/5 1/4 3/5 3/4 2/5 1/4 3/5 3/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
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