數學題...
1. CROSS
+ ROADS
= DANGER
If S = 3 and each letter represents a different digit 1 - 9, find their values.
2. A magazine has 36 pages. The front page is page 1. What other pages are on the same sheet as page 10?
3. A toad fell down a 12-foot well. It can't hop out. It has to climb out. It climbs 4 feet a day, but during the night, while resting, it slips back 2 feet. At this rate, how many days will it take the toad to climb out of the well?
4. What is the time missing from the following sequence?
WATCH A -- 3:21
WATCH B -- 5:25
WATCH C -- 9:30
WATCH D -- 3:36
WATCH E -- ??
5. 7 people meet in a room. Each person shakes hands once with each other. How many handshakes are there altogether?
6. The rope ladder of a boat hangs over the side of the boat and just reaches the water. Its rungs are 8 inches apart. How many rungs will be under the water when the tide rises 4 feet?