What will be the value of $x$ as per the following figures?

A cashier has ₹ 620 in the denominations of two-rupee notes, ten-rupee notes and fifty-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he/she has ?

A square park $P Q R S$ of side $90 \mathrm{~m}$ is so located that its diagonal $P R$ is from north to south and the corner $Q$ is to the west of $S$. Radha and Mohan start walking along the sides from $Q$ and $R$ respectively in clockwise and anti-clockwise directions with speeds of $8 \mathrm{~km} / \mathrm{hr}$ and $10 \mathrm{~km} / \mathrm{hr}$. Where will they cross each other the second time ?

Find the number of triangles in the following figure :

How many triangles are there in the given figure?

In this question, find out how many such pairs of letters are there in the given word each of which has as many letters between them in the word as in the English alphabet.

CREATIVE

In the word 'SOLUTION', how many pairs of letters are there in the word that have as many letters between them as they do in the English alphabet?