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*1. The sum of three consecutive*

*odd natural numbers is 147.*

*Then, the middle number is :*

*(1) 47 (2) 48*

*(3) 49 (4) 51*

*(SSC CGL Exam. 04.07.1999*

*(IInd Sitting)*

*2. The sum of first 20 odd natural*

*numbers is equal to :*

*(1) 210 (2) 300*

*(3) 400 (4) 420*

*(SSC CGL Exam. 27.02.2000*

*(Ist Sitting)*

*3. The sum of all natural numbers*

*from 75 to 97 is :*

*(1) 1598 (2) 1798*

*(3) 1958 (4) 1978*

*(SSC CGL Exam. 27.02.2000*

*(Ist Sitting)*

*4. The sum of all natural numbers*

*between 100 and 200, which are*

*multiples of 3 is :*

*(1) 5000 (2) 4950*

*(3) 4980 (4) 4900*

*(SSC CGL Exam. 27.02.2000*

*(Ist Sitting)*

*5. The sum of the squares of three*

*consecutive natural numbers is*

*2030. Then, what is the middle*

*number?*

*(1) 25 (2) 26*

*(3) 27 (4) 28*

*(SSC CGL Exam. 27.02.2000*

*(IInd Sitting)*

*6. The sum of three consecutive odd*

*natural numbers is 87. The*

*smallest of these numbers is :*

*(1) 29 (2) 31*

*(3) 23 (4) 27*

*(SSC CGL Exam. 24.02.2002*

*(Ist Sitting)*

*7. Sum of three consecutive even*

*integers is 54. Find the least*

*among them.*

*(1) 18 (2) 15*

*(3) 14 (4) 16*

*(SSC CGL Exam. 24.02.2002*

*(IInd Sitting)*

*8. The sum of three consecutive*

*numbers is 87. The middle number*

*is*

*(1) 27 (2) 29*

*(3) 30 (4) 28*

*(SSC CGL Prelim Exam. 24.02.2002*

*(Middle Zone)*

*9. What is the sum of two*

*consecutive even numbers, the*

*difference of whose square is 84?*

*(1) 38 (2) 34*

*(3) 42 (4) 46*

*(SSC CGL Prelim Exam. 11.05.2003*

*(Second Sitting)*

*10. The sum of all the natural numbers*

*from 51 to 100 is*

*(1) 5050 (2) 4275*

*(3) 4025 (4) 3775*

*(SSC CPO S.I.*

*Exam. 05.09.2004)*

**Solution :-**

*1. (3) 2. (3) 3. (4) 4. (2)*

*5. (2) 6. (4) 7. (4) 8. (2)*

*9. (3) 10. (4)*