Number System The population of a town increases by 15% in the first year and decreases by 25% in the second year. If its current population is 168480 then what will be its population after two years ? 145914 145314 145214 145714 145914 145314 145214 145714 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Population of the town= 168480 x 115/100 x 75/100= 145314
Number System 486+32×25—59=? 528 596 582 567 528 596 582 567 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 528
Number System In how many different ways can the letters of the word 'DETERMINE' be arranged ? 63480 61480 60480 62480 63480 61480 60480 62480 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP No. of arrangements = 9! / 3! Because, E comes 3 times = 60480
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1160 1180 1120 1140 1160 1180 1120 1140 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System The difference between a positive proper fraction and its reciprocal is 9/20. The fraction is: 4/5 3/5 3/10 5/4 4/5 3/5 3/10 5/4 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 1/x - x = 9/20 20x2 + 9x - 20 = 0 20x2 + 25x - 16x - 20 = 0 5x(4x + 5) -4(4x + 5) = 0(4x + 5)(5x - 4) = 0x = 4/5
Number System In how many different ways can the letters of the word 'LEASE' be arranged ? None of these 80 40 60 None of these 80 40 60 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The world LEASE consists of 5 letters in which E comes twice ∴ 51/21 = 5x4x3x2x1/2x1 = 60
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