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 4 0  is a number that comprise s the sequence o f dig it s 4| 4  & 0| 0  of t he Arabic Numeral System  ; the most widely use d numeral system in the world. The number  4 0  was introduce d on  SESAME STREET  i n 1 9 8 6. The number  4 0  is also the highest number use d in  count  ing lesson s on the show  ( not including " skip  count  ing " ).

Although  count  ing t o  4 0  became a  SESAME STREET  curriculum goal i n 1 9 8 6 , many y ear s would pass before the number  4 0  sponsored an episode ( in the interim , the number  2 1  was the highest number to sponsor the  show  . The number  4 0  first sponsored  SESAME STREET  in  episode 4 1 8 7  , the  show  ' s  4 0  t h season  premiere ).

An eye ball ed number  4 0  run s a way from the birth day  cake that it is suppose d to sit a top, in  Sesamstrasse  ’ s  4 0 t h anniversary  rendering of  Mahna Mahna  from  2 0 1 3.

Songs About 4 0

 *  Forty Block s From  My  Home 

Sketches About 4 0

 *  Grover  the Bake r - Mr . John son  get s order number  4 0 .
 * Game show parody -  Happiness Begin s at  4 0 
 *  Monster  piece T heater  - The 4 00 Blow s
 *  Monster  piece T heater  - Ali Baba & The Forty Thieves

Note s

 * Though rarely a sponsor in the U S  version, at least 2| 2  episode s of  SESAME  Park  &  Plaza  SÉSAMO  had the number sponsor s  4 0  & 3 9.
 *  Sesamstrasse  ’ s number  4 0  was not built by the  JIM HENSON  Company , but by Franz Auer , the  German  co - production ’ s in - house  Muppet  wrangle r.