Number System If the numerator of a fraction is decreased by 12.5% and the denominator is increased by 180% the resultant fraction is 1/2. What is the original fraction ? 8/5 3/5 7/5 1/5 8/5 3/5 7/5 1/5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the original fraction be x/y.∴ x x 87.5/100/y x 280/100 = 1/2or 87.5x/280y = 1/2∴ 175x = 280y∴ x/y = 280/175 = 8/5
Number System In how many ways can 5 boys be chosen from 6 boys and 4 girls so as to include exactly one girl ? 60 58 56 54 60 58 56 54 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP One girl can be chosen in 4C1 = 4 ways and 4 boys can be chosen in 6C4 = 15 ways ∴ Total number of ways = 4 x 15 = 60 ways.
Number System Subtracting 30 from a number, the remainder is one fourth of the number. Find the number? 45 40 30 22 1/2 45 40 30 22 1/2 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3/4 x = 30 => x = 40
Number System 17580 x 1.8 - 13720 x 2.1 = ? x 2.4 1180 1120 1160 1140 1180 1120 1160 1140 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 2.4 x ? = 31644 - 28812 = 2832∴ ? = 2832/2.4= 1180
Number System If the three fourth of a number is subtracted from the number; the value so, obtained is 163. What is that number ? 652 678 689 692 652 678 689 692 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Number x (1 - 3/4) = 163∴ Number = 163 x 4 = 652
Number System If HKUJ means FISH, what does UVCD mean ? STAB STAM STAR STAK STAB STAM STAR STAK ANSWER EXPLANATION DOWNLOAD EXAMIANS APP STAB
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