10ticks Friday Puzzle
Welcome to Ian’s Friday Puzzle! Dust off those Friday cobwebs with a little manipulation of the old grey matter. Perplexing puzzles, logical, illogical, and sometimes just plain stupid. Be prepared to be bewildered, befuddled and bedazzled!
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This week's Friday Puzzle
The 10 cm line is a tangent to the inner circle of the two concentric circles.
Find the yellow area.
Friday Puzzle (17/11/2023)
Martha has some marbles. She lays them out in equally spaced lines to form a square lattice.
She finds she needs 50 more marbles to complete the square lattice.
Mum, by mistake, buys her 150 more marbles.
By luck she is able to use every single marble she now has to complete a square lattice made of equally spaced lines.
How many marbles are in her final square?
Friday Puzzle (10/11/2023)
Find the digits A, B, C so that 5555ABC is a perfect square.
No calculators!
(A, B, C are the hundreds, tens and ones digits of the number).
Friday Puzzle (03/11/2023)
4 ⊕ 2 = 2682
6 ⊕ 3 = 29183
8 ⊕ 4 = 212324
What is 12 ⊕ 4 equal to?
Friday Puzzle (27/10/2023)
Which is bigger 3100 or 475?
Friday Puzzle (13/10/2023)
Jim has some biscuits.
He can share them among his x friends in two ways.
7 biscuits each with 2 left over, or 6 biscuits each with 7 left over.
How many biscuits does Jim have?
Friday Puzzle (06/10/2023)
If 4 × 4 = 07
12 × 12 = 09
23 × 23 = 16
What is 34 × 34 = ?
Friday Puzzle (22/09/2023)
Place the numbers 1 - 9 in the circles.
The number at the bottom must equal the sum of the two numbers above it.
