Puzzle 425
My first is in horse, but not in pony.
My second is in coyote, but not in jackal.
My third is in shrew, and also in vole.
My fourth is in panda, but not in bear.
My last is in baboon, but not in monkey.
What am I?
Puzzle Copyright © Kevin Stone
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Hint
The first letter can only be H, R, S, or E.
Answer
A hyena.
Reasoning
The 1st letter can be: H R S E
The 2nd letter can be: O Y T E
The 3rd letter can be: E
The 4th letter can be: P N D
The 5th letter can be: B A
Puzzle 426
Can you complete the grid without forming a 3-In-A-Row of the same colour.
Each row and column has an equal number of Blue and White squares.
This puzzle has been added to the collection of logic puzzles that change daily on BrainBashers. Click the link at the top of the page to see today's puzzles.
Puzzle Copyright © Kevin Stone
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Hint
Remember that you can't have three White or Blue squares together in a row or column.
Answer
Puzzle 427
Can you find three consecutive odd numbers that...
...total 1,287 when multiplied together?
Puzzle Copyright © Kevin Stone
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Hint
Try starting with the cube root of the number.
Answer
9 x 11 x 13.
Reasoning
Since we're after three numbers that multiply together, a good place to start is the cube root of 1,287, which is roughly 10.88.
Let's try dividing by the closest odd number to 10.88:
1287 ÷ 11 = 117
We're now after whole divisors of 117, so trying either odd number either side of 11 might work.
Trying either 9 or 13 gives the answer.
Double-Checking
9 x 11 x 13 = 1,287
Note
Trying the closest odd number to the cube root always works, and the other two numbers are the odd numbers either side.
Puzzle 428
What number comes next in this sequence:
302 202 102 002 991 {?}
Puzzle Copyright © Kevin Stone
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Hint
Try reversing the numbers.
Answer
891.
If we reverse each of the numbers we get:
203 202 201 200 199 {?}
Which is counting down from 203, and the next number is 198, which is 891 when reversed.
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