What goes through cities and fields, but never moves?

Decode below rebus
D
N
A
T
S , D

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

What does this rebus mean?

O
N
C
E
TIME

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Prove that twice of ten is the same as twice of eleven.