1. A story, Xiao Wang typed for 8 hours and Lao Zhang typed for 6 hours. Now both of them are typing at the same time, and Lao Zhang stopped on the road 1 hour. How many hours did Xiao Wang play when he finished the task?

On the way, Lao Zhang stopped 1 hour, which is equivalent to Xiao Wang working ahead of schedule 1 hour.

1× 1 = 1.

The cooperation between the two is completed.

1-8 points 1 = 7 points and 8 points.

The cooperation completion time is

7/8 (1+6/8 1) = 3 (hours)

Xiao Wang called.

1+3 = 4 (hours)

2. There is a column number of 2, 5, 8, 1 1, 14 ... According to this rule, which number is 104?

The last number is 3 more than the previous one.

104 is the first in this column.

(104-2) ÷ 3+ 1 = 35 (pieces)

There is a man who is all dogs, and his birthday is March 20th. In a certain year, the product of their ages is 207025, and the sum of their ages is 102. What is a?

207025 = 5×5×7×7× 13× 13

Combine these factors into various age groups.

The age difference of these people is a multiple of 12.

So it's 13,13,25,49.

But these add up to =13+13+25+49 =100.

We're two people short.

Use 1 And 13- 1= 12.

So there are six people, and their ages are 1, 1, 13, 13, 25 and 49 respectively.

a=6 .