Mathematics
Grade-4-
Easy
Question
The gardener planted 7 rose bushes in the first garden and added 7 more rose bushes in the next garden and then 7 more in the third garden. The total rose bushes he planted in the 10ᵗʰ garden are?
- 70
- 50
- 40
- 30
Hint:
We are given the number of roses planted by the gardener in different gardens. He plants roses in 10 gardens. We are asked the number of roses planted in 10th garden. In first garden, there are 7 roses. In second (7 + 7) bushes. In third (7 + 7 + 7 ) bushes and so on.
The correct answer is: 70
The number of roses increases by 7 with every garden. And the number of gardens is from 1 to 10.
The number of roses is increasing by 7 with increasing number of gardens.
So, we can also write the number of buses using multiplication.
First garden : 7 × 1 = 7
Second garden : 7 × 2 = 14 which is same as (7 + 7)
Third garden : 7 × 3 = 21
Similarly, for 10th garden we can write
Tenth garden : 7 × 10 = 70
Therefore, the number of rose buses planted by the gardener in 10th garden is 70.
We have to be careful about the order of multiples. For such questions, operation of multiplication is used.
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