Eight of us go fourth, not back, to protect our king from an attack. What are we?

What English word has three consecutive double letters?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Out of four images which one is the odd one out?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

Can you fill the blank with the correct number?

6 30 870 756030 _____

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 ?

What goes up but never comes down?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

A father's child, a mother's child, yet no one's son.

Who am I?