1. What is the arithmetic mean of first 20 odd natural numbers ? (1) 19 (2) 17 (3) 22 (4) 20 Ans. 4 2. Two positive whole numbers are such that the sum of the first number and twice the second number is 8 and their difference is 2. The number are : (1) 7, 5 (2) 6, 4 (3) 4, 2 (4) 3, 5 Ans. 3 3. Which one of the following numbers is not a squareof any natural numbers ? (1) 17956 (2) 18225 (3) 63592 (4) 53361 Ans. 3 4. Numbers 2, 4, 6, 8, 10, ..........196, 198, 200 are multiplied together. The number of zeros at the end of the on the right will be equal to- (1) 21 (2) 22 (3) 24 (4) 25 Ans. 2 5. 800 chocolates were distributed among the students of a class. East student got twice as many chocolates as the number of students in the class. The number of the students in the class was : (1) 25 (2) 30 (3) 35 (4) 20 Ans. 4 6. The numbers are 2, 4, 6, 8, ....., 98, 100 are multiplied together. The number of zeros at the end of the product must be ...
Preparation for Competitive exams SSC RAILWAY