Silly puzzles to confound you
D. Indumathi, The Institute of Mathematical Sciences, Chennai
Here are some puzzles for you. Some are simple, some are silly, and some will make you reach out for paper and pen. Enjoy!
Silly Puzzles
S1. How many times does the digit 5 occur in the numbers from 1 to 100?
S2. Mr. Raja has four daughters. Each daughter has a brother. How many children does Mr. Raja have?
S3. I add five to nine and get two. The answer is correct, but how?

Visual Puzzles
V1. Connect the dots with no more than 4 straight lines, without lifting your hand from the paper.
V2. Which tank will fill first?
V3. Proceeding up the staircase, the numbers form a logical sequence. What number belongs on the top step?
V4. How many circles contain a black dot?

Paper and Pen Puzzles
P1. Find out the numbers in the boxes.
P2. ABCDE x 4 = EDCBA. Can you find what are the numbers A, B, C, D, E?
Answers on Page XX.