Questions

There are many isotopes of uranium and all of them have same atomic number i.e, sum of nmber of neutrons and protons.

Squirrels typically build leaf nests in the summer by weaving together small branches they've gnawed off of trees. These nests are lined with grass, moss, leaves and pine needles. Both male and female gray squirrels of all ages participate in building dens.
 

'Rare earth'(They are all metals)

Tablespoon > Teaspoon

In US & UK, 1 Tablespoon = 3 Teaspoons.

Let the integer be x. Then,

 x2-20x = 156

(x + 6)(x - 26) = 0

x = 26

The integer is 26.

The first session of Indian National Congress was held from 28–31 December 1885, in Mumbai and was attended by 72 delegates. Womesh Chandra Bonnerjee was the first president of the Indian National Congress (INC), a voice of Indian opinion to the British government.