The average of 25 results is 18. The average of first twelve of them is 14 and that of last twelve is 17. Find the thirteenth result -

Read the statements and select a conclusion from the given alternatives: 

Statements: 
Some owls are ostriches.
Some ostriches are crows.
Some crows are black.
Conclusion: 
1. Some owls are black.
2. No ostrich is black.
3. No owl is black.
4. Some ostriches are black. 

The following questions consist of a set of three figures X, Y3 and Z showing a sequence of folding of a piece of paper. Fig (Z) shows the manner in which the folded paper has been cut. These three figures are followed by four answer figures from which you have to choose a figure which would most closely resemble the unfolded form fig. (Z)

Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number.
 19 : 324 :: 25 : 576 :: 9 : ?

Direction : Study the following information carefully and answer the questions given below:
Six persons are sitting in a row facing to the north and they have different ages but not necessarily in the same order. C sits 3rd from one of the end. The one who is 12 year old sits 2nd to the right of C.
The number of persons sit right of the one who 12 year old is same as the number of persons sit to the left of D. O sits 2nd to the right of the one who is 6 year old. Two persons sit between D and B, whose age is twice than D. N sits to the right of P. The one who 36 year old sits 3rd to the left of the one who 15 year old. The age of O is 18 year.

If P is 3 year older than C, then which of the following is the age of P?

How many triangles are there in the given figure? 

The below series uses a sequence of alphabets and numbers. Identify the incorrect combination: 

(i) FT85DF77ER

(ii) FT85DF77ER

(iii) FT85DE77ER

(iv) FT85DF77ER

A piece of paper is folded and pierced as shown in the question figures below. When it is opened, what will it look like in the given answer figures?