To travel 80 miles the truck will use some of the petrol in it.So after travelling 80 miles truck’s total weight will be less than 100,000 Pounds .so if a small bird lands on the truck nothing will happen if the total weight of truck and bird is less than 100,000.

No one lying.Three doctors are womens.Hence Robert has no brothers only sisters.

He shot his reflection on the mirror.

zero,one,two,……ninety nine are 100 words without letter ‘A’

zero,one,two,…….nine hundred ninety nine are 1000 words without letter ‘A’.

[note:read 102 as one hundred two not one hundred and two.]

1 Cup.

Because 1/2+1/4+1/8+…….will add upto 1.This is a mathematical property

The bus driver was walking.

One Bundle.

Because he combined them all

They are number of letters in the word.

Twice ten =Twenty,   Twenty contain 6 letters.

Six   Contains 3 letters.

Nine ,4 letters

twelve,6 letters

five,4 letters

Alexandria.

Children’s names are those places where the ancient wonders of world stood.

(But how come she know the sex of the child before giving birth ,and what will she do if seventh child is a boy)

Initially three piles contains cards as       11      7          6

1.Take 7 cards from pile 1 and put it in the pile Two so each  pile has           4       14     6

2.Take  6 cards from pile 2 and put it in pile 3  so  piles has                           4       8      12

3.Now take 4 cards from pile 3 and put it in pile 1                                          8      8       8