Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 1/289 290/289 289 289/290 1/289 290/289 289 289/290 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be a and b. Then,ab = 17, a = 1 and b = 17So, 1/a2 + 1/b2 = (a2 + b2)/a2 b2 = (12 + 172)/(1 * 17)2 = 290/289
Number System A number exceeds by 25 from its 3/8 part. Then the number is? 32 40 35 39 32 40 35 39 ANSWER DOWNLOAD EXAMIANS APP
Number System 20% of the total number of students in a school play football. How many students do not play football if the total number of students in the school is 7600 ? 5976 5800 6000 6080 5976 5800 6000 6080 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 20% of 7600 = 1520Therefore, students who do not play football = 7600 - 1520 = 6080
Number System The sum of three consecutive even numbers is 252. What is the sum of the smallest and the largest numbers? 170 169 171 168 170 169 171 168 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 168
Number System 432+2170+35=? 494 729 678 523 494 729 678 523 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 494
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 61480 63480 60480 62480 61480 63480 60480 62480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
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