Number System The product of two natural numbers is 17. Then, the sum of the reciprocals of their squares is: 290/289 1/289 289 289/290 290/289 1/289 289 289/290 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 4500 * ? = 3375 3/5 3/4 1/4 2/5 3/5 3/4 1/4 2/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 4500 * x = 3375= x = 3375/4500 = 3/4
Number System When the square of a number is substracted from (68)², the answer so obtained is 2508. What is the number ? 45 44 46 47 45 44 46 47 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP (68)² - x² = 2508Therefore, x² = 4624 = 2508Therefore, x = root of 2116 = 46
Number System Find the least number which when divided by 35 and 11 leaves a remainder of 1 in each case. 388 391 384 386 388 391 384 386 ANSWER DOWNLOAD EXAMIANS APP
Number System 7432 ÷ 32 x ? = 2787 78 41 21 12 78 41 21 12 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 7432/32 x ? = 2787= ? = 2787 x 32/7432 = 12
Number System In how many different ways can the letters of the word CORPORATION be arranged ? 2326400 1326400 None of these 3326400 2326400 1326400 None of these 3326400 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP CORPORATION = 11 letters 'O' comes thrice,'R' twice.∴ total no. of ways = 111/3121 = 3326400
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