A website Maths Puzzle

Q. What is the next term in this sequence?

1, 11, 21, 1211, 111221,... ?

Read Solution (Total 2)

312211
14 years agoHelpfull: Yes(2) No(7)

Ans is 312211
in 1 have only one 1 so next no. is 11.
in 11 have two 1's so 21.
in 21 have only one 2 and only one 1 so 1211,
as like that three 1s, two 2's and one 1 so 312211.
10 years agoHelpfull: Yes(2) No(1)

A website Other Question

A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.

Q. How far does the dog travel in 1 hour? There are 2 trees in a garden (tree "A" and "B") and on the both trees are some birds.

The birds of tree A say to the birds of tree B that if one of you come to our tree, then our population will be the double of yours.

Then the birds of tree B tell to the birds of tree A that if one of you come here, then our population will be equal to that of yours.

Q. How many birds in each tree?