Number System Which one of the following is the sum of the numbers 1, 3, 5, 7, 9…. up to nth number? N2 + 1 N2 N(N + 1)/2 N(N + 1) N2 + 1 N2 N(N + 1)/2 N(N + 1) ANSWER DOWNLOAD EXAMIANS APP
Number System If the average of two numbers is 88.5 and one number is 5.5 less than the average. Find out the next number. 91 94 97 86 91 94 97 86 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 94
Number System 50% of 8/15 of 9/4 of 5/3 of 333 = ? 666 555 333 444 666 555 333 444 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 50% of [8x9x5/15x4x3 x 333]= 50% of 666= 333
Number System The sum of a number and its reciprocal is one-eighth of 34. What is the product of the number and its square root? 27 8 None of these 32 27 8 None of these 32 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,x + 1/x = 34/8 8x2 - 34x + 8 = 0 4x2 - 17x + 4 = 0 (4x - 1)(x - 4) = 0 x = 4required number = 4 * √4 = 4 * 2 = 8.
Number System If the sum of one-half of a number exceeds one-third of that number by 7 1/3, the number is: 30 15 20 18 30 15 20 18 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the number be x. Then,(1/2 x + 1/5 x) - 1/3 x = 22/311/30 x = 22/3x = 20
Number System The sum of three consecutive multiples of 3 is 72. What is the largest number? 27 24 21 36 27 24 21 36 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be 3x, 3x + 3 and 3x + 6.Then,3x + (3x + 3) + (3x + 6) = 729x = 63x = 7Largest number = 3x + 6 = 27.
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