Can you find a number …
… whose double exceeds its quarter by 7.
Puzzle Copyright © Kevin Stone
workings
hint
answer
print
www.brainbashers.com
/puzzle/zhrw
share
Hint
The number is less than 100.
Answer
4.
4's double is 8, and 4's quarter is 1.
Reasoning
If the missing number is N, then:
2N = N + 7
—
4
Multiply throughout by 4:
8N = N + 28
Subtract N from both sides:
7N = 28
Divide throughout by 7:
N = 4
