The sum of the ages of Sandy and Emma is 29. The sum of the ages of Sandy and Bin is 26. The sum of the ages of Bin and Emma is 31. How old is the youngest chi
The sum of the ages of Sandy and Emma is 29. The sum of the ages of Sandy and Bin is 26. The sum of the ages of Bin and Emma is 31. How old is the youngest child? A 10 B 17 C 14 D 12 A tree is planted at every 10 meters along a stretch of road. If the stretch of road is 150 m long and the trees are planted at opposite ends of the road how many trees are there? A 15 B 14 C 17 D 16 Ann made some cakes to share with her friends. She spent 50 minutes making the dough and 1 hour and 35 minutes baking the cakes. Then, she spent 1 hour and 15 minutes decorating the cakes. It was 7:10 P.M. when she finished all of the cakes. What time did Ann start making the cakes? A 4:10 p.m. B 3:55 p.m. C 3:40 p.m. D 3:30 p.m . At 6 o'clock, a bike rides from A to B, its speed is 12 km/h. After 2 hours, a motorbike rides from B to A, its speed is 35 km/h. Such as AB = 118 km. What time did two people meet? A 0.3229166666666667 B 0.2916666666666667 C 0.34375 D 0.3333333333333333 Find the value of the following expression: 1 + 2 + 3 +⋯ + 97 + 98 + 99 + 100 + 99 + 98 + 97 + ⋯ + 3 + 2 + 1 A 10100 B 5050 C 10000 D 11000
Lời giải 1 :
The sum of the ages of Sandy and Emma is 29. The sum of the ages of Sandy and Bin is 26. The sum of the ages of Bin and Emma is 31. How old is the youngest child?
A 10
B 17
C 14
D 12 ( Sandy: 12)
A tree is planted at every 10 meters along a stretch of road. If the stretch of road is 150 m long and the trees are planted at opposite ends of the road how many trees are there?
A 15
B 14
C 17
D 16
Ann made some cakes to share with her friends. She spent 50 minutes making the dough and 1 hour and 35 minutes baking the cakes. Then, she spent 1 hour and 15 minutes decorating the cakes. It was 7:10 P.M. when she finished all of the cakes. What time did Ann start making the cakes?
A 4:10 p.m.
B 3:55 p.m.
C 3:40 p.m.
D 3:30 p.m
At 6 o'clock, a bike rides from A to B, its speed is 12 km/h. After 2 hours, a motorbike rides from B to A, its speed is 35 km/h. Such as AB = 118 km. What time did two people meet?
A 0.3229166666666667
B 0.2916666666666667
C 0.34375
D 0.3333333333333333
Find the value of the following expression: 1 + 2 + 3 +⋯ + 97 + 98 + 99 + 100 + 99 + 98 + 97 + ⋯ + 3 + 2 + 1
A 10100
B 5050
C 10000
D 11000
Thảo luận
Lời giải 2 :
Câu 1: Sandy 12 tuổi
Câu 2: 30 cây
Câu 3 : D
Câu 4 : B
Câu 5 : C
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