Number System Which choice provides the answer : If 2 + 3 = 10, 6 + 5 = 66, 7 + 2 = 63, 9 + 7 = 144 then, 8 + 4 = ? 114 102 96 88 114 102 96 88 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 96
Number System Complete the series : 81, 69, 58, 48, 39 ........ 31 29 30 28 31 29 30 28 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 31
Number System In how many different ways can the letters of the word TEST' be arranged ? 8 12 10 16 8 12 10 16 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The word TEST consists of 4 letters in which T comes twice ∴ Number of arrangements= 4!/2! = 4 x 3 x 2 x 1/2 x 1 = 12
Number System The sum of the digits of a two-digit number is 12, and the difference between the number and the number obtained by interchanging the two digits of the number is 18. Find the number. 25 12.5 50 75 25 12.5 50 75 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be 10x + y.∴ x + y = 12 ...........(i)10x + y - (10x + x) = 18or 10x + y - 10y - x = 18or 9x - 9y = 18∴ x - y = 2From (i) and (ii), x = 7, y = 5∴ Number = 75
Number System What should come in place of the question mark (?) in the following number series ? 888 888 444 148 ? 7.4 35 29 37 33 35 29 37 33 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 888 ÷ 1 = 888888 ÷ 2 = 444444 ÷ 3 = 148148 ÷ 4 = 3737 ÷ 5 = 7.4
Number System In how many different ways can the letters of word 'BIOLOGY' be arranged ? 2367 2410 2520 2678 2367 2410 2520 2678 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In BIOLOGY total 7 letters are there but O comes twice.∴ Number of arrangements = 7!/2! = 2520