Number System 2536+4851—?=3450+313 3624 4567 6784 5243 3624 4567 6784 5243 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 3624
Number System If the difference between the squares of two consecutive numbers is 47, what is the smaller number ? 26 24 23 25 26 24 23 25 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the numbers be (x + 1) and x.Therefore, (x + 1)² - x² = 47x² + 2x + 1 - x² = 472x + 1 = 47Therefore, x = 46/2 = 23
Number System In how many different ways can the letters of the word TEST' be arranged ? 8 10 16 12 8 10 16 12 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 If (47)² is added to the square of a number the answer thus obtained is 2290. What is the number ? 10 9 7 8 10 9 7 8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Let the no. be x Therefore, x² + (47)² = 2290Therefore, x² = 2290 - 2209 = 81Therefore, x = 9
Number System The sum of the digits of a two digit number is 12. If the new number formed by reversing the digits is greater than the original number by 54, then what will be the original number? 49 69 39 59 49 69 39 59 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 39
Number System 20% of the total number of students in a school play football. How many students do not play football if the total number of students in the school is 7600 ? 5976 6080 6000 5800 5976 6080 6000 5800 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP 20% of 7600 = 1520Therefore, students who do not play football = 7600 - 1520 = 6080
EXAMIANS