First, the table problem, a square table, how many corners are there after cutting off a corner?

Second, the problem of cutting tofu: a piece of tofu can be cut three times, up to a few pieces.

Third, the problem of cutting watermelon: three knives cut 7 petals, eat the remaining 8 skins, how to cut?

Fourth, the bamboo pole problem: Can a 5-meter-long bamboo pole pass through the 1 meter-high door?

5. Paper box problem: Can a stick of 1.5m be put in a one-meter square box?

Sixth, the clock problem: 12 hours, how many times does the clock and minute hand repeat? www.ctwxc.com

Seven, origami problem: a piece of paper with a thickness of 1 mm, folded in half 1000 times, how high is the thickness?

8. How many times does the clock turn from zero? 12 hour. Do the hour hand, minute hand and second hand coincide? And inform the overlapping position.

9. Pancake question: It takes mom two minutes to bake a cake, one minute to bake the front and back, and at most two cakes are put into the pot at the same time, so how many minutes does it take to bake three cakes at least?

Ten, socks problem, there are five pairs of socks of different colors in the drawer, and the light is not turned on. How many pairs of socks of the same color do you need to pull out?

Eleven, the egg problem: Xiao Zhang sells eggs, a basket of eggs, the first person bought half, Xiao Zhang gave him another. The second man bought another half, and Xiao Zhang gave him another egg. The third man bought the other half of the egg, and Xiao Zhang gave him another one. The fourth man came to buy half, and Xiao Zhang gave him another one, just after buying the eggs! How many eggs does Xiao Zhang have in total?

Complete set of mathematical formulas:

1, each copy × number of copies = total number of copies, total number of copies/number of copies = number of copies, total number of copies/number of copies = number of copies.

2, 1 multiple × multiple = multiple, multiple1multiple = multiple, multiple/multiple = 1 multiple.

3. Speed × time = distance, distance/speed = time, distance/time = speed.

4. Unit price × quantity = total price, total price/unit price = quantity, total price/quantity = unit price.

5. Work efficiency × working hours = total workload, total workload ÷ work efficiency = working hours, total workload ÷ working hours = work efficiency.

6. Appendix+Appendix = sum, one addend = another addend.

7. The minuend-subtrahend = difference, the minuend-difference = subtrahend, and the difference+subtrahend = minuend.

8, factor × factor = product, product ÷ one factor = another factor.

9. Divider ○ Divider = quotient quilt cover, divisor ○ quotient = divisor, quotient × divisor = dividend.