Monday Math Puzzle #Bolsover

… and April Mood at the Bolsover Castle

Bolsover Castle is located in town of Bolsover, situated in the north-east of the English county of Derbyshire. Built in the early 17th century, the present castle lies on the earthworks and ruins of the 12th century medieval castle, with the first structure of the present castle having been built between 1612 and 1617 by Sir Charles Cavendish.

Today the site is now in the care of the English Heritage charity, as both a Grade I listed building and a Scheduled Ancient Monument.

The original castle was built by the Peverel family in the 12th century and became Crown property in 1155 when William Peverel the Younger died. The Ferrers family who were Earls of Derby laid claim to the Peveril property.

When a group of barons led by King Henry II’s sons – Henry the Young King, Geoffrey Duke of Brittany, and Prince Richard, later Richard the Lionheart – revolted against the king’s rule, Henry spent £116 on building at the castles of Bolsover and Peverilin Derbyshire. The garrison was increased to a force led by 20 knights and was shared with the castles of Peveril and Nottingham during the revolt. John ascended the throne in 1199 after his brother Richard’s death. William de Ferrers maintained the claim of the Earls of Derby to the Peveril estates. He paid John 2000 marks for the lordship of the Peak, but the Crown retained possession of Bolsover and Peveril Castles. John finally gave them to Ferrers in 1216 to secure his support in the face of country-wide rebellion. However, the castellan Brian de Lisle refused to hand them over. Although Lisle and Ferrers were both John’s supporters, John gave Ferrers permission to use force to take the castles. The situation was still chaotic when Henry III became king after his father’s death in 1216. Bolsover fell to Ferrers’ forces in 1217 after a siege.

The castle was returned to crown control in 1223, at which point £33 was spent on repairing the damage the Earl of Derby had caused when capturing the castle six years earlier. Over the next 20 years, four towers were added, the keep was repaired, various parts of the curtain wall were repaired, and a kitchen and barn were built, all at a cost of £181. From 1290 onward, the castle and its surrounding manor were granted to a series of local farmers. Under their custodianship, the castle gradually fell into a state of disrepair.

Bolsover castle was rewarded to George Talbot, the 6th Earl of Shrewsbury, by King Edward VI in 1553. Following Talbot’s death in 1590, his second son Gilbert, 7th Earl of Shrewsbury, sold the ruins of Bolsover Castle to his step-brother and brother-in-law Sir Charles Cavendish, who wanted to build a castle on the original site. Working with the famous builder and designer Robert Smythson, the castle was designed for elegant living rather than defence,[ before their deaths in 1614 and 1617, respectively. The building of the castle was continued by Charles’ two sons, William and John, who were influenced by the Italian-inspired work of London-based architect Inigo Jones. The tower, known today as the ‘Little Castle’, was completed around 1621.

The building of Bolsover Castle was interrupted by the Civil War that occurred between 1642 and 1651, during which the castle was taken by the Parliamentarians who slighted it, before it then fell into a ruinous state. William Cavendish added a new hall and staterooms to the Terrace Range and, by the time of his death in 1676, the castle had been restored to good order. The main usage of the building extended over 20 years and it is presumed that the family over stayed at the castle towards the end of that period. It passed through the female line into the Bentinck family, and ultimately became one of the seats of the Dukes of Portland. After 1883 the castle was uninhabited and given to the nation by the 7th Duke of Portland in 1945. The castle is now in the care of English Heritage.

Bolsover Castle is a Scheduled Ancient Monument,[ a “nationally important” historic building and archaeological site which has been given protection against unauthorised change. It is also a Grade I listed building (first listed in 1985), and recognised as an internationally important structure.

(Reference – Wikipedia)

2 + 5 + 7 + 1 = 17

8 + 4 + 2 + 6 = 44

4 + 5 + 9 + 3 = 47

9 + 3 + 6 + 5 = ? 


7 + 6 + 5 = 143

4 + 3 + 2 =  35

1 + 9 + 8 = 170

7 + 4 + 1 = ? 

Happy Monday, wherever you are! 🙂



  1. După aşa plimbare frumoasă la castel, greu m-am adunat să mă concentrez. Am reuşit ceva, sper că e bine: 57 şi 55.
    Mulţumesc pentru informaţii şi pentru fptografiile frumoase!
    O zi bună, draga mea!

  2. For the first puzzle I set this rule:
    a + b + c + d = e, where
    e = ( a x b ) + ( c x d )
    Will have then: ( 9 x 3 ) + ( 6 x 5 ) = 57

    For the second puzzle I got this:
    a + b + c = d, where
    ( a + b ) x ( b + c ) = d.
    We have then: ( 7 + 4 ) x ( 4 x 1 ) = 55 .

    Thank you so much for accepting the game, even did not get the right answer. I hope it was a good fun. Have a beautiful day!

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