IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 585  591 of 968
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Question number: 585
Question
The sum of the fourth term and the six term of an ascending A. P. is 50 and the product of the third term by the fifth term is 200. Find the sum of the first ten terms of this A. P
Choices
Choice (4)  Response  

a.  392.5 

b.  529.5 

c.  292.5 

d.  492.5 

Question number: 586
Question
In an A. P. , the sum of first n terms is, find its term
Choices
Choice (4)  Response  

a.  76 

b.  79 

c.  75 

d.  78 

Question number: 587
Question
Four numbers are inserted between the numbers 10 and 40 such that an A. P. results. Find the biggest of these four numbers.
Choices
Choice (4)  Response  

a.  35 

b.  39 

c.  38 

d.  34 

Question number: 588
Question
If the sum of three consecutive terms of an increasing A. P. is 18 and the product of the first and third of these terms is 35, then the third term is ________
Choices
Choice (4)  Response  

a.  12 

b.  3 

c.  0 

d.  7 

Question number: 589
Question
If Belongs to A. P. such that, then the value of equals ________
Choices
Choice (4)  Response  

a.  6116 

b.  1308 

c.  2400 

d.  1900 

Question number: 590
Question
If the term of an A. P. is and term is, then the terms is ________
Choices
Choice (4)  Response  

a.  2 

b.  4 

c.  3 

d.  1 

Question number: 591
Question
If Belongs to A. P. such that, then the value of equals ________
Choices
Choice (4)  Response  

a.  1654 

b.  1325 

c.  4582 

d.  1840 
