21. On dividing a number by 5, we get 3 as remainder. What will the remainder when the square of the this number is divided by 5 ?
22. (12 Â + 22 Â + 32 Â + … + 102 ) = ?
23. A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:
24. The product of two numbers is 9375 and the quotient, when the larger one is divided by the smaller, is 15. The sum of the numbers is:
25. What is the two-digit number?
I . The difference between the two digits is 9.II . The sum of the digits is equal to the difference between the two digits. I and II given below it. You have to decide whether the data provided in the statement(s) is / are sufficient to answer the given question. Read the both statements and choose the most appropriate answer.
26. A and B invest in a business in the ratio 3 : 2. If 5% of the total profit goes to charity and A's share is Birr. 855, the total profit is:
27. A and B started a business in partnership investing Birr. 20,000 and Birr. 15,000 respectively. After six months, C joined them with Birr. 20,000. What will be B's share in total profit of Birr. 25,000 earned at the end of 2 years from the starting of the business?
28. 10 women can complete a work in 7 days and 10 children take 14 days to complete the work. How many days will 5 women and 10 children take to complete the work?
29. A train speeds past a pole in 15 seconds and a platform 100 m long in 25 seconds. Its length is:
30. A bank offers 5% compound interest calculated on half-yearly basis. A customer deposits Birr.1600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is:
31. The least perfect square, which is divisible by each of 21, 36 and 66 is:
33. If 20% of a = b, then b% of 20 is the same as:
34. A man took loan from a bank at the rate of 12% p.a. simple interest. After 3 years he had to pay Rs. 5400 interest only for the period. The principal amount borrowed by him was:
36. Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P,Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
37. In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
38. The average monthly income of P and Q is Birr. 5050. The average monthly income of Q and R is Birr. 6250 and the average monthly income of P and R is Birr. 5200. The monthly income of P is:
39. A person takes a loan of Birr. 200 at 5% simple interest. He returns Birr. 100 at the end of 1 year. In order to clear his dues at the end of 2 years, he would pay:
40. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmh. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
