Mambo No. 5 the song debuted at number one on the UK Singles Chart, becoming Bob the Builder's second number-one single there after "Can We Fix It?". The song experienced major success in Australia and Ireland. In the former country, the song debuted at number three on the ARIA Singles Chart on 4 November 2001 and reached number two on 18 November, held off the top spot by Alien Ant Farm's cover of "Smooth Criminal". After staying at number two for another week, the song began to leave the chart, spending nine more weeks in the top 50. In Ireland, the song first
25 (number) 25 (number) 25 (twenty-five) is the natural number following 24 and preceding 26. It is a square number, being 5 = 5 × 5. It is one of two two-digit numbers whose square and higher powers of the number also ends in the same last two digits, e.g. 25 = 625, the other is 76. It is the smallest square that is also a sum of two (non-zero) squares: 25 = 3 + 4. Hence it often appears in illustrations of the Pythagorean theorem. 25 is the sum of the single-digit odd natural numbers 1, 3, 5, 7 and 9,