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15. Playing with Numbers
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Q7 of 52 Page 336


Find the number of rectangles of the given figure?

Given, a rectangle grid

We need to find out the number of rectangles in the figure


⇒ 1 + 2 + 3 + 4 + 5 + 6 = 21


Hence, 21 rectangles are there in the given figure.


More from this chapter

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5

Sum of ‘n’ odd number of consecutive numbers is divisible by ‘n’. Explain the reason.

6

Is 111 + 211 + 311 + 411 divisible by 5? Explain.

8

Rahul’s father wants to deposit some amount of money every year on the day of Rahul’s birthday. On his 1st birth day Rs.100, on his 2nd birth day Rs.300, on his 3rd birth day Rs.600, on his 4th birthday Rs.1000 and so on. What is the amount deposited by his father on Rahul’s 15th birthday.

9

Find the sum of integers from 1 to 100 which are divisible by 2 or 5.

Questions · 52
15. Playing with Numbers
1 2 3 4 5 5 5 5 5 6 7 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 1 2 3 4 5 6 7 8 9 10
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