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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 ...

A man gave 50% of his savings of Rs 84,100 to his wife and divided the remaining the sum among his two sons A and B if 15 and 13 years of age respectively. He divided it in such a way that each of his sons, when they attain of age 18years, would receive the same amount at 5% compound interest per annum. The share of B is Watch the video for solution in hindi