Number System If the sum of four consecutive numbers is 370, which the following is the third lowest number among them 89 91 90 92 89 91 90 92 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the four consecutive numbers be x, (x + 1), (x + 2), (x + 3) thenx + (x + 1) + (x + 2) + (x + 3) = 370= 4x + 6 = 370∴ x = 364/4 = 91∴ third lowest number among them = x + 1= 91 + 1 = 92
Number System If 70% of an equal to 40% of b, then ratio between a and b is? 7: 4 7: 11 4: 7 None 7: 4 7: 11 4: 7 None ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 70 a = 40 ba: b = 4: 7
Number System Four-fifth of a number is 10 more than two-third of the same number. What is the number? 91 35 75 89 91 35 75 89 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 75
Number System Supply the missing figure : 1, 4, 9, 16, 25 .... 49 16 36 42 23 16 36 42 23 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 36
Number System If the sum of five consecutive even numbers A, B, C, D and E is 130, what is the product of A and E ? 840 780 720 660 840 780 720 660 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the consecutive even numbers be A = 2x, B = 2x + 2, C = 2x + 4, D = 2x + 6 and E = 2x + 8= A + B + C + D + E = 130= 10x + 20 = 130∴ x = 130 - 20/10 = 11Therefore, product of A and E= 22 x 30 = 660
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 32 None of these 8 27 32 None of these 8 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.
EXAMIANS