[HELP]

1)[/b]. Multiply 21978 by 4





Now see if you can find a pair of palindromes





2)[/b] 7. 1, 3, 6, 10





Name the next three numbers in the series





3).[/b] Can you change a rupee note in such a way that there are
exactly fifty coins? No 2 Paise coins





4)[/b]. SEVEN
VIGINTILLION, THREE HUNDRED FORTY SIX NOVEMDECILLION, SIX HUNDRED FORTY EIGHT
OCTODECILLION, FOUR SEPTEDECILLION, FIVE HUNDRED SIXTY xxxDECILLION, NINE
HUNDRED EIGHTYSIXQUINDECILLION, TWO HUNDRED FIFTEEN QUATTOUR DECILLION, THREE
HUNDRED FORTY EIGHT DUODECILLION, FOUR HUNDRED FORTY FOUR UNDECILLION, TWO
HUNDRED EIGHTYSIX DECILLION, FOUR HUNDRED FORTY FIVE NONILLION, THREE HUNDRED
AND FIVE OCTILLION, ONE HUNDRED FORTY SIX SEPTILLION, THIRTY NINE xxxTILLION;
ONE HUNDRED FORTY QUINTILLION, FORTY SIX QUADRILLION, NINE HUNDRED SIXTY





TRILLION, SIX. HUNDRED SEVENTY EIGHT. BILLION,
FIVE HUNDRED EIGHTY TWO MILLION, TWO HUNDRED FIFTY SIX THOUSAND AND THREE. Can
you write this as a numeral?



5)[/b] . How many numbers between 400 and 600 begin with or end
with a digit of 5 ?