Seven friends M, N, O, P, Q, R and S, each has a different age. Only two people are older than Q. P is older than Q but younger than O. M is older than R but younger than S. Only three people are younger than S. N is the youngest among all. The age of how many persons is between the ages of Q and R?

How many triangles are there in the given figure? 

If 28 February 2017 was Tuesday, then what was the day of the week on 28 February 2019?

Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 34 * 4 * 15 * 51 * 27 * 9 * 40

Select the option that represents the letters that, when placed from left to right in the given blanks, will complete the letter series.
 D E _ W G _ E F _ G D E F U _ D _ F T G

In a certain code language, ‘APRON’ is written as ‘CNTMP’ and ‘EARTH’ is written as ‘GYTRJ’. How will ‘HEAVY’ be written in that language?

The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown in the following figure. How would this paper look when when unfolded?

Question figure.

Which of the following numbers will replace the question mark (?) in the given series?
 8, 16,13, ?, 47, 282