It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Find the next number in the series below

21 32 54 87 131 ?

In the four images below, can you find the odd one out?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

When we see 2 but call 10?

O_er_t_o_

Complete the missing letters of the given word.

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?