BrainBashers - Random Puzzles

Puzzle 1

This is a well known children's musical piece, the vowels have been removed and the remaining letters have been grouped together. Can you determine the correct words?
lttl mssm ffts tntf fttn ghrc rdsn dwhy thrc mbgs pdrw hstd wnbs dhrn dfrg htnd mssm fftw y

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Puzzle 2

How many people must be at a party before you are likely to have two having the same birthday (but not necessarily the same year)?

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Puzzle 3

What is the smallest positive integer, which, when multiplied by 6 …

… gives a number consisting of only 8's?

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Puzzle 4

Using all of the letters A to Z, each once only, complete these common words.
-e-rd -u-et wa-t- -um-y -e-er a-o-e mi--d -hew- hu-i- -abi- co--h ho--e arg--

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